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Automated rollback of commit 48881f1f45. 

*** Reason for rollback ***

Broke a test

*** Original change description ***

The auto-configured toolchains provided by Bazel itself have diverged heavily from the version maintained in this repo. There is no need to maintain this duplication until Starlarkification has progressed succiciently for rules_cc to be the source of truth for them.

This is particularly relevant for Bzlmod, which currently uses the toolchains defined in rules_cc. As a result, Bazel C++ builds will use subtly different toolchains depending on whether --enable_bzlmod is used or not. This is fixed...

***

PiperOrigin-RevId: 501228335
Change-Id: I858dc3ea44df7ae70b5603f6dc2e082b4540c42a
This commit is contained in:
Googler 2023-01-11 02:47:44 -08:00 committed by Copybara-Service
parent 48881f1f45
commit bc665f9271
32 changed files with 7737 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
.bazelci/presubmit.yml
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@ -10,6 +10,8 @@ x_defaults:
- "//:all"
- "//cc:all"
- "//cc/private/rules_impl:all"
- "//cc/private/toolchain:all"
- "//cc/runfiles:all"
- "//examples:all"
- "//examples/my_c_archive:all"
- "//examples/my_c_compile:all"
@ -21,6 +23,7 @@ x_defaults:
- "//:all"
- "//cc:all"
- "//cc/private/rules_impl:all"
- "//cc/private/toolchain:all"
- "//examples:all"
- "//examples/my_c_archive:all"
- "//examples/my_c_compile:all"

3
cc/BUILD
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@ -20,6 +20,7 @@ filegroup(
name = "all_files_for_testing",
srcs = glob(["**"]) + [
"//cc/private/rules_impl:srcs",
"//cc/private/toolchain:srcs",
],
)
@ -51,6 +52,7 @@ filegroup(
"**/*.bzl",
]) + [
"//cc/private/rules_impl:bzl_srcs",
"//cc/private/toolchain:bzl_srcs",
],
visibility = ["//visibility:public"],
)
@ -62,6 +64,7 @@ filegroup(
"**/BUILD",
]) + [
"//cc/private/rules_impl:srcs",
"//cc/private/toolchain:srcs",
],
visibility = ["//visibility:public"],
)

2
cc/extensions.bzl
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@ -13,8 +13,8 @@
# limitations under the License.
"""Module extension for cc auto configuration."""
load("@bazel_tools//tools/cpp:cc_configure.bzl", "cc_autoconf", "cc_autoconf_toolchains")
load("@bazel_tools//tools/osx:xcode_configure.bzl", "xcode_configure")
load("//cc/private/toolchain:cc_configure.bzl", "cc_autoconf", "cc_autoconf_toolchains")
def _cc_configure_impl(_):
cc_autoconf_toolchains(name = "local_config_cc_toolchains")

100
cc/private/toolchain/BUILD Normal file
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@ -0,0 +1,100 @@
load("//cc:defs.bzl", "cc_flags_supplier", "cc_library", "compiler_flag")
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
package(default_visibility = ["//visibility:public"])
licenses(["notice"]) # Apache 2.0
# It is frequently necessary to constrain platforms based on the cc compiler type.
constraint_setting(name = "cc_compiler")
constraint_value(
name = "clang",
constraint_setting = ":cc_compiler",
)
constraint_value(
name = "gcc",
constraint_setting = ":cc_compiler",
)
constraint_value(
name = "msvc",
constraint_setting = ":cc_compiler",
)
constraint_value(
name = "clang-cl",
constraint_setting = ":cc_compiler",
)
constraint_value(
name = "mingw",
constraint_setting = ":cc_compiler",
)
constraint_value(
name = "msys",
constraint_setting = ":cc_compiler",
)
cc_library(
name = "malloc",
)
filegroup(
name = "grep-includes",
srcs = ["grep-includes.sh"],
)
filegroup(
name = "empty",
srcs = [],
)
filegroup(
name = "bzl_srcs",
srcs = glob(["**/*.bzl"]),
)
filegroup(
name = "srcs",
srcs = glob(["**"]),
)
filegroup(
name = "interface_library_builder",
srcs = ["build_interface_so"],
)
filegroup(
name = "osx_wrapper",
srcs = ["osx_cc_wrapper.sh"],
)
filegroup(
name = "link_dynamic_library",
srcs = ["link_dynamic_library.sh"],
)
filegroup(
name = "lib_cc_configure",
srcs = ["lib_cc_configure.bzl"],
)
compiler_flag(name = "compiler")
cc_flags_supplier(name = "cc_flags")

52
cc/private/toolchain/BUILD.empty Normal file
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@ -0,0 +1,52 @@
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
load("@rules_cc//cc:defs.bzl", "cc_library", "cc_toolchain", "cc_toolchain_suite")
package(default_visibility = ["//visibility:public"])
load(":cc_toolchain_config.bzl", "cc_toolchain_config")
cc_library(
name = "malloc",
)
filegroup(
name = "empty",
srcs = [],
)
cc_toolchain_suite(
name = "toolchain",
toolchains = {
"local": ":local",
"local|local": ":local",
},
)
cc_toolchain(
name = "local",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
toolchain_config = ":local_config",
toolchain_identifier = "local",
)
cc_toolchain_config(name = "local_config")

112
cc/private/toolchain/BUILD.static.freebsd Normal file
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@ -0,0 +1,112 @@
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This becomes the BUILD file for @local_config_cc// under FreeBSD.
package(default_visibility = ["//visibility:public"])
load("@rules_cc//cc:defs.bzl", "cc_library", "cc_toolchain", "cc_toolchain_suite")
load(":cc_toolchain_config.bzl", "cc_toolchain_config")
cc_library(
name = "malloc",
)
filegroup(
name = "empty",
srcs = [],
)
# Hardcoded toolchain, legacy behaviour.
cc_toolchain_suite(
name = "toolchain",
toolchains = {
"armeabi-v7a": ":cc-compiler-armeabi-v7a",
"armeabi-v7a|compiler": ":cc-compiler-armeabi-v7a",
"freebsd": ":cc-compiler-freebsd",
"freebsd|compiler": ":cc-compiler-freebsd",
},
)
cc_toolchain(
name = "cc-compiler-freebsd",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 0,
toolchain_config = ":local_freebsd",
toolchain_identifier = "local_freebsd",
)
cc_toolchain_config(
name = "local_freebsd",
cpu = "freebsd",
)
toolchain(
name = "cc-toolchain-freebsd",
exec_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:freebsd",
],
target_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:freebsd",
],
toolchain = ":cc-compiler-freebsd",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
cc_toolchain(
name = "cc-compiler-armeabi-v7a",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 0,
toolchain_config = ":stub_armeabi-v7a",
toolchain_identifier = "stub_armeabi-v7a",
)
cc_toolchain_config(
name = "stub_armeabi-v7a",
cpu = "armeabi-v7a",
)
toolchain(
name = "cc-toolchain-armeabi-v7a",
exec_compatible_with = [
"@platforms//cpu:arm",
],
target_compatible_with = [
"@platforms//cpu:arm",
"@platforms//os:android",
],
toolchain = ":cc-compiler-armeabi-v7a",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
filegroup(
name = "link_dynamic_library",
srcs = ["link_dynamic_library.sh"],
)

20
cc/private/toolchain/BUILD.toolchains.tpl Normal file
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@ -0,0 +1,20 @@
load("@local_config_platform//:constraints.bzl", "HOST_CONSTRAINTS")
toolchain(
name = "cc-toolchain-%{name}",
exec_compatible_with = HOST_CONSTRAINTS,
target_compatible_with = HOST_CONSTRAINTS,
toolchain = "@local_config_cc//:cc-compiler-%{name}",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
toolchain(
name = "cc-toolchain-armeabi-v7a",
exec_compatible_with = HOST_CONSTRAINTS,
target_compatible_with = [
"@platforms//cpu:arm",
"@platforms//os:android",
],
toolchain = "@local_config_cc//:cc-compiler-armeabi-v7a",
toolchain_type = "@rules_cc//cc:toolchain_type",
)

113
cc/private/toolchain/BUILD.tpl Normal file
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@ -0,0 +1,113 @@
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This becomes the BUILD file for @local_config_cc// under non-FreeBSD unixes.
package(default_visibility = ["//visibility:public"])
load(":cc_toolchain_config.bzl", "cc_toolchain_config")
load(":armeabi_cc_toolchain_config.bzl", "armeabi_cc_toolchain_config")
load("@rules_cc//cc:defs.bzl", "cc_toolchain", "cc_toolchain_suite")
licenses(["notice"]) # Apache 2.0
cc_library(
name = "malloc",
)
filegroup(
name = "empty",
srcs = [],
)
filegroup(
name = "cc_wrapper",
srcs = ["cc_wrapper.sh"],
)
filegroup(
name = "compiler_deps",
srcs = glob(["extra_tools/**"], allow_empty = True) + [%{cc_compiler_deps}],
)
# This is the entry point for --crosstool_top. Toolchains are found
# by lopping off the name of --crosstool_top and searching for
# the "${CPU}" entry in the toolchains attribute.
cc_toolchain_suite(
name = "toolchain",
toolchains = {
"%{name}|%{compiler}": ":cc-compiler-%{name}",
"%{name}": ":cc-compiler-%{name}",
"armeabi-v7a|compiler": ":cc-compiler-armeabi-v7a",
"armeabi-v7a": ":cc-compiler-armeabi-v7a",
},
)
cc_toolchain(
name = "cc-compiler-%{name}",
toolchain_identifier = "%{cc_toolchain_identifier}",
toolchain_config = ":%{cc_toolchain_identifier}",
all_files = ":compiler_deps",
ar_files = ":compiler_deps",
as_files = ":compiler_deps",
compiler_files = ":compiler_deps",
dwp_files = ":empty",
linker_files = ":compiler_deps",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = %{supports_param_files},
)
cc_toolchain_config(
name = "%{cc_toolchain_identifier}",
cpu = "%{target_cpu}",
compiler = "%{compiler}",
toolchain_identifier = "%{cc_toolchain_identifier}",
host_system_name = "%{host_system_name}",
target_system_name = "%{target_system_name}",
target_libc = "%{target_libc}",
abi_version = "%{abi_version}",
abi_libc_version = "%{abi_libc_version}",
cxx_builtin_include_directories = [%{cxx_builtin_include_directories}],
tool_paths = {%{tool_paths}},
compile_flags = [%{compile_flags}],
opt_compile_flags = [%{opt_compile_flags}],
dbg_compile_flags = [%{dbg_compile_flags}],
cxx_flags = [%{cxx_flags}],
link_flags = [%{link_flags}],
link_libs = [%{link_libs}],
opt_link_flags = [%{opt_link_flags}],
unfiltered_compile_flags = [%{unfiltered_compile_flags}],
coverage_compile_flags = [%{coverage_compile_flags}],
coverage_link_flags = [%{coverage_link_flags}],
supports_start_end_lib = %{supports_start_end_lib},
)
# Android tooling requires a default toolchain for the armeabi-v7a cpu.
cc_toolchain(
name = "cc-compiler-armeabi-v7a",
toolchain_identifier = "stub_armeabi-v7a",
toolchain_config = ":stub_armeabi-v7a",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
)
armeabi_cc_toolchain_config(name = "stub_armeabi-v7a")

316
cc/private/toolchain/BUILD.windows.tpl Normal file
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@ -0,0 +1,316 @@
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This becomes the BUILD file for @local_config_cc// under Windows.
package(default_visibility = ["//visibility:public"])
load("@rules_cc//cc:defs.bzl", "cc_toolchain", "cc_toolchain_suite", "cc_library")
load(":windows_cc_toolchain_config.bzl", "cc_toolchain_config")
load(":armeabi_cc_toolchain_config.bzl", "armeabi_cc_toolchain_config")
cc_library(
name = "malloc",
)
filegroup(
name = "empty",
srcs = [],
)
filegroup(
name = "mingw_compiler_files",
srcs = [":builtin_include_directory_paths_mingw"]
)
filegroup(
name = "clangcl_compiler_files",
srcs = [":builtin_include_directory_paths_clangcl"]
)
filegroup(
name = "msvc_compiler_files",
srcs = [":builtin_include_directory_paths_msvc"]
)
# Hardcoded toolchain, legacy behaviour.
cc_toolchain_suite(
name = "toolchain",
toolchains = {
"armeabi-v7a|compiler": ":cc-compiler-armeabi-v7a",
"x64_windows|msvc-cl": ":cc-compiler-x64_windows",
"x64_windows|msys-gcc": ":cc-compiler-x64_windows_msys",
"x64_windows|mingw-gcc": ":cc-compiler-x64_windows_mingw",
"x64_windows|clang-cl": ":cc-compiler-x64_windows-clang-cl",
"x64_windows_msys": ":cc-compiler-x64_windows_msys",
"x64_windows": ":cc-compiler-x64_windows",
"armeabi-v7a": ":cc-compiler-armeabi-v7a",
},
)
cc_toolchain(
name = "cc-compiler-x64_windows_msys",
toolchain_identifier = "msys_x64",
toolchain_config = ":msys_x64",
all_files = ":empty",
ar_files = ":empty",
as_files = ":mingw_compiler_files",
compiler_files = ":mingw_compiler_files",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
)
cc_toolchain_config(
name = "msys_x64",
cpu = "x64_windows",
compiler = "msys-gcc",
host_system_name = "local",
target_system_name = "local",
target_libc = "msys",
abi_version = "local",
abi_libc_version = "local",
cxx_builtin_include_directories = [%{cxx_builtin_include_directories}],
tool_paths = {%{tool_paths}},
tool_bin_path = "%{tool_bin_path}",
dbg_mode_debug_flag = "%{dbg_mode_debug_flag}",
fastbuild_mode_debug_flag = "%{fastbuild_mode_debug_flag}",
)
toolchain(
name = "cc-toolchain-x64_windows_msys",
exec_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
"@rules_cc//cc/private/toolchain:msys",
],
target_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
],
toolchain = ":cc-compiler-x64_windows_msys",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
cc_toolchain(
name = "cc-compiler-x64_windows_mingw",
toolchain_identifier = "msys_x64_mingw",
toolchain_config = ":msys_x64_mingw",
all_files = ":empty",
ar_files = ":empty",
as_files = ":mingw_compiler_files",
compiler_files = ":mingw_compiler_files",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 0,
)
cc_toolchain_config(
name = "msys_x64_mingw",
cpu = "x64_windows",
compiler = "mingw-gcc",
host_system_name = "local",
target_system_name = "local",
target_libc = "mingw",
abi_version = "local",
abi_libc_version = "local",
tool_bin_path = "%{mingw_tool_bin_path}",
cxx_builtin_include_directories = [%{mingw_cxx_builtin_include_directories}],
tool_paths = {%{mingw_tool_paths}},
dbg_mode_debug_flag = "%{dbg_mode_debug_flag}",
fastbuild_mode_debug_flag = "%{fastbuild_mode_debug_flag}",
)
toolchain(
name = "cc-toolchain-x64_windows_mingw",
exec_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
"@rules_cc//cc/private/toolchain:mingw",
],
target_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
],
toolchain = ":cc-compiler-x64_windows_mingw",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
cc_toolchain(
name = "cc-compiler-x64_windows",
toolchain_identifier = "msvc_x64",
toolchain_config = ":msvc_x64",
all_files = ":empty",
ar_files = ":empty",
as_files = ":msvc_compiler_files",
compiler_files = ":msvc_compiler_files",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
)
cc_toolchain_config(
name = "msvc_x64",
cpu = "x64_windows",
compiler = "msvc-cl",
host_system_name = "local",
target_system_name = "local",
target_libc = "msvcrt",
abi_version = "local",
abi_libc_version = "local",
toolchain_identifier = "msvc_x64",
msvc_env_tmp = "%{msvc_env_tmp}",
msvc_env_path = "%{msvc_env_path}",
msvc_env_include = "%{msvc_env_include}",
msvc_env_lib = "%{msvc_env_lib}",
msvc_cl_path = "%{msvc_cl_path}",
msvc_ml_path = "%{msvc_ml_path}",
msvc_link_path = "%{msvc_link_path}",
msvc_lib_path = "%{msvc_lib_path}",
cxx_builtin_include_directories = [%{msvc_cxx_builtin_include_directories}],
tool_paths = {
"ar": "%{msvc_lib_path}",
"ml": "%{msvc_ml_path}",
"cpp": "%{msvc_cl_path}",
"gcc": "%{msvc_cl_path}",
"gcov": "wrapper/bin/msvc_nop.bat",
"ld": "%{msvc_link_path}",
"nm": "wrapper/bin/msvc_nop.bat",
"objcopy": "wrapper/bin/msvc_nop.bat",
"objdump": "wrapper/bin/msvc_nop.bat",
"strip": "wrapper/bin/msvc_nop.bat",
},
default_link_flags = ["/MACHINE:X64"],
dbg_mode_debug_flag = "%{dbg_mode_debug_flag}",
fastbuild_mode_debug_flag = "%{fastbuild_mode_debug_flag}",
)
toolchain(
name = "cc-toolchain-x64_windows",
exec_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
],
target_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
],
toolchain = ":cc-compiler-x64_windows",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
cc_toolchain(
name = "cc-compiler-x64_windows-clang-cl",
toolchain_identifier = "clang_cl_x64",
toolchain_config = ":clang_cl_x64",
all_files = ":empty",
ar_files = ":empty",
as_files = ":clangcl_compiler_files",
compiler_files = ":clangcl_compiler_files",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
)
cc_toolchain_config(
name = "clang_cl_x64",
cpu = "x64_windows",
compiler = "clang-cl",
host_system_name = "local",
target_system_name = "local",
target_libc = "msvcrt",
abi_version = "local",
abi_libc_version = "local",
toolchain_identifier = "clang_cl_x64",
msvc_env_tmp = "%{clang_cl_env_tmp}",
msvc_env_path = "%{clang_cl_env_path}",
msvc_env_include = "%{clang_cl_env_include}",
msvc_env_lib = "%{clang_cl_env_lib}",
msvc_cl_path = "%{clang_cl_cl_path}",
msvc_ml_path = "%{clang_cl_ml_path}",
msvc_link_path = "%{clang_cl_link_path}",
msvc_lib_path = "%{clang_cl_lib_path}",
cxx_builtin_include_directories = [%{clang_cl_cxx_builtin_include_directories}],
tool_paths = {
"ar": "%{clang_cl_lib_path}",
"ml": "%{clang_cl_ml_path}",
"cpp": "%{clang_cl_cl_path}",
"gcc": "%{clang_cl_cl_path}",
"gcov": "wrapper/bin/msvc_nop.bat",
"ld": "%{clang_cl_link_path}",
"nm": "wrapper/bin/msvc_nop.bat",
"objcopy": "wrapper/bin/msvc_nop.bat",
"objdump": "wrapper/bin/msvc_nop.bat",
"strip": "wrapper/bin/msvc_nop.bat",
},
default_link_flags = ["/MACHINE:X64", "/DEFAULTLIB:clang_rt.builtins-x86_64.lib"],
dbg_mode_debug_flag = "%{clang_cl_dbg_mode_debug_flag}",
fastbuild_mode_debug_flag = "%{clang_cl_fastbuild_mode_debug_flag}",
)
toolchain(
name = "cc-toolchain-x64_windows-clang-cl",
exec_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
"@rules_cc//cc/private/toolchain:clang-cl",
],
target_compatible_with = [
"@platforms//cpu:x86_64",
"@platforms//os:windows",
],
toolchain = ":cc-compiler-x64_windows-clang-cl",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
cc_toolchain(
name = "cc-compiler-armeabi-v7a",
toolchain_identifier = "stub_armeabi-v7a",
toolchain_config = ":stub_armeabi-v7a",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
)
armeabi_cc_toolchain_config(name = "stub_armeabi-v7a")
toolchain(
name = "cc-toolchain-armeabi-v7a",
exec_compatible_with = [
],
target_compatible_with = [
"@platforms//cpu:arm",
"@platforms//os:android",
],
toolchain = ":cc-compiler-armeabi-v7a",
toolchain_type = "@rules_cc//cc:toolchain_type",
)
filegroup(
name = "link_dynamic_library",
srcs = ["link_dynamic_library.sh"],
)

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# Copyright 2019 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A Starlark cc_toolchain configuration rule"""
load(
"@rules_cc//cc:cc_toolchain_config_lib.bzl",
"feature",
"tool_path",
)
def _impl(ctx):
toolchain_identifier = "stub_armeabi-v7a"
host_system_name = "armeabi-v7a"
target_system_name = "armeabi-v7a"
target_cpu = "armeabi-v7a"
target_libc = "armeabi-v7a"
compiler = "compiler"
abi_version = "armeabi-v7a"
abi_libc_version = "armeabi-v7a"
cc_target_os = None
builtin_sysroot = None
action_configs = []
supports_pic_feature = feature(name = "supports_pic", enabled = True)
supports_dynamic_linker_feature = feature(name = "supports_dynamic_linker", enabled = True)
features = [supports_dynamic_linker_feature, supports_pic_feature]
cxx_builtin_include_directories = []
artifact_name_patterns = []
make_variables = []
tool_paths = [
tool_path(name = "ar", path = "/bin/false"),
tool_path(name = "compat-ld", path = "/bin/false"),
tool_path(name = "cpp", path = "/bin/false"),
tool_path(name = "dwp", path = "/bin/false"),
tool_path(name = "gcc", path = "/bin/false"),
tool_path(name = "gcov", path = "/bin/false"),
tool_path(name = "ld", path = "/bin/false"),
tool_path(name = "nm", path = "/bin/false"),
tool_path(name = "objcopy", path = "/bin/false"),
tool_path(name = "objdump", path = "/bin/false"),
tool_path(name = "strip", path = "/bin/false"),
]
return cc_common.create_cc_toolchain_config_info(
ctx = ctx,
features = features,
action_configs = action_configs,
artifact_name_patterns = artifact_name_patterns,
cxx_builtin_include_directories = cxx_builtin_include_directories,
toolchain_identifier = toolchain_identifier,
host_system_name = host_system_name,
target_system_name = target_system_name,
target_cpu = target_cpu,
target_libc = target_libc,
compiler = compiler,
abi_version = abi_version,
abi_libc_version = abi_libc_version,
tool_paths = tool_paths,
make_variables = make_variables,
builtin_sysroot = builtin_sysroot,
cc_target_os = cc_target_os,
)
armeabi_cc_toolchain_config = rule(
implementation = _impl,
attrs = {},
provides = [CcToolchainConfigInfo],
)

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#!/bin/bash
if [[ $# != 2 ]]; then
echo "Usage: $0 <so> <interface so>" 1>&2
exit 1
fi
exec cp $1 $2

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# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Rules for configuring the C++ toolchain (experimental)."""
load("@bazel_tools//tools/osx:xcode_configure.bzl", "run_xcode_locator")
load(
":lib_cc_configure.bzl",
"get_cpu_value",
"resolve_labels",
)
load(":osx_cc_configure.bzl", "configure_osx_toolchain")
load(":unix_cc_configure.bzl", "configure_unix_toolchain")
load(":windows_cc_configure.bzl", "configure_windows_toolchain")
def _generate_cpp_only_build_file(repository_ctx, cpu_value, paths):
repository_ctx.template(
"BUILD",
paths["@rules_cc//cc/private/toolchain:BUILD.toolchains.tpl"],
{"%{name}": cpu_value},
)
def cc_autoconf_toolchains_impl(repository_ctx):
"""Generate BUILD file with 'toolchain' targets for the local host C++ toolchain.
Args:
repository_ctx: repository context
"""
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:BUILD.toolchains.tpl",
"@bazel_tools//tools/osx/crosstool:BUILD.toolchains",
"@bazel_tools//tools/osx/crosstool:osx_archs.bzl",
"@bazel_tools//tools/osx:xcode_locator.m",
])
env = repository_ctx.os.environ
cpu_value = get_cpu_value(repository_ctx)
# Should we try to find C++ toolchain at all? If not, we don't have to generate toolchains for C++ at all.
should_detect_cpp_toolchain = "BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN" not in env or env["BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN"] != "1"
# Should we unconditionally *not* use xcode? If so, we don't have to run Xcode locator ever.
should_use_cpp_only_toolchain = "BAZEL_USE_CPP_ONLY_TOOLCHAIN" in env and env["BAZEL_USE_CPP_ONLY_TOOLCHAIN"] == "1"
# Should we unconditionally use xcode? If so, we don't have to run Xcode locator now.
should_use_xcode = "BAZEL_USE_XCODE_TOOLCHAIN" in env and env["BAZEL_USE_XCODE_TOOLCHAIN"] == "1"
if not should_detect_cpp_toolchain:
repository_ctx.file("BUILD", "# C++ toolchain autoconfiguration was disabled by BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN env variable.")
elif cpu_value == "darwin" and not should_use_cpp_only_toolchain:
xcode_toolchains = []
# Only detect xcode if the user didn't tell us it will be there.
if not should_use_xcode:
# TODO(#6926): Unify C++ and ObjC toolchains so we don't have to run xcode locator to generate toolchain targets.
# And also so we don't have to keep this code in sync with @rules_cc//cc/private/toolchain:osx_cc_configure.bzl.
(xcode_toolchains, _xcodeloc_err) = run_xcode_locator(
repository_ctx,
paths["@bazel_tools//tools/osx:xcode_locator.m"],
)
if should_use_xcode or xcode_toolchains:
repository_ctx.symlink(paths["@bazel_tools//tools/osx/crosstool:BUILD.toolchains"], "BUILD")
repository_ctx.symlink(paths["@bazel_tools//tools/osx/crosstool:osx_archs.bzl"], "osx_archs.bzl")
else:
_generate_cpp_only_build_file(repository_ctx, cpu_value, paths)
else:
_generate_cpp_only_build_file(repository_ctx, cpu_value, paths)
cc_autoconf_toolchains = repository_rule(
environ = [
"BAZEL_USE_CPP_ONLY_TOOLCHAIN",
"BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN",
],
implementation = cc_autoconf_toolchains_impl,
configure = True,
)
def cc_autoconf_impl(repository_ctx, overriden_tools = dict()):
"""Generate BUILD file with 'cc_toolchain' targets for the local host C++ toolchain.
Args:
repository_ctx: repository context
overriden_tools: dict of tool paths to use instead of autoconfigured tools
"""
env = repository_ctx.os.environ
cpu_value = get_cpu_value(repository_ctx)
if "BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN" in env and env["BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN"] == "1":
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:BUILD.empty",
"@rules_cc//cc/private/toolchain:empty_cc_toolchain_config.bzl",
])
repository_ctx.symlink(paths["@rules_cc//cc/private/toolchain:empty_cc_toolchain_config.bzl"], "cc_toolchain_config.bzl")
repository_ctx.symlink(paths["@rules_cc//cc/private/toolchain:BUILD.empty"], "BUILD")
elif cpu_value == "freebsd":
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:BUILD.static.freebsd",
"@rules_cc//cc/private/toolchain:freebsd_cc_toolchain_config.bzl",
])
# This is defaulting to a static crosstool, we should eventually
# autoconfigure this platform too. Theorically, FreeBSD should be
# straightforward to add but we cannot run it in a docker container so
# skipping until we have proper tests for FreeBSD.
repository_ctx.symlink(paths["@rules_cc//cc/private/toolchain:freebsd_cc_toolchain_config.bzl"], "cc_toolchain_config.bzl")
repository_ctx.symlink(paths["@rules_cc//cc/private/toolchain:BUILD.static.freebsd"], "BUILD")
elif cpu_value == "x64_windows":
# TODO(ibiryukov): overriden_tools are only supported in configure_unix_toolchain.
# We might want to add that to Windows too(at least for msys toolchain).
configure_windows_toolchain(repository_ctx)
elif (cpu_value == "darwin" and
("BAZEL_USE_CPP_ONLY_TOOLCHAIN" not in env or env["BAZEL_USE_CPP_ONLY_TOOLCHAIN"] != "1")):
configure_osx_toolchain(repository_ctx, overriden_tools)
else:
configure_unix_toolchain(repository_ctx, cpu_value, overriden_tools)
MSVC_ENVVARS = [
"BAZEL_VC",
"BAZEL_VC_FULL_VERSION",
"BAZEL_VS",
"BAZEL_WINSDK_FULL_VERSION",
"VS90COMNTOOLS",
"VS100COMNTOOLS",
"VS110COMNTOOLS",
"VS120COMNTOOLS",
"VS140COMNTOOLS",
"VS150COMNTOOLS",
"VS160COMNTOOLS",
"TMP",
"TEMP",
]
cc_autoconf = repository_rule(
environ = [
"ABI_LIBC_VERSION",
"ABI_VERSION",
"BAZEL_COMPILER",
"BAZEL_HOST_SYSTEM",
"BAZEL_CXXOPTS",
"BAZEL_LINKOPTS",
"BAZEL_LINKLIBS",
"BAZEL_PYTHON",
"BAZEL_SH",
"BAZEL_TARGET_CPU",
"BAZEL_TARGET_LIBC",
"BAZEL_TARGET_SYSTEM",
"BAZEL_USE_CPP_ONLY_TOOLCHAIN",
"BAZEL_USE_XCODE_TOOLCHAIN",
"BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN",
"BAZEL_USE_LLVM_NATIVE_COVERAGE",
"BAZEL_LLVM",
"BAZEL_IGNORE_SYSTEM_HEADERS_VERSIONS",
"USE_CLANG_CL",
"CC",
"CC_CONFIGURE_DEBUG",
"CC_TOOLCHAIN_NAME",
"CPLUS_INCLUDE_PATH",
"GCOV",
"HOMEBREW_RUBY_PATH",
"SYSTEMROOT",
] + MSVC_ENVVARS,
implementation = cc_autoconf_impl,
configure = True,
)
# buildifier: disable=unnamed-macro
def cc_configure():
"""A C++ configuration rules that generate the crosstool file."""
cc_autoconf_toolchains(name = "local_config_cc_toolchains")
cc_autoconf(name = "local_config_cc")
native.bind(name = "cc_toolchain", actual = "@local_config_cc//:toolchain")
native.register_toolchains(
# Use register_toolchain's target pattern expansion to register all toolchains in the package.
"@local_config_cc_toolchains//:all",
)

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:: Copyright 2019 The Bazel Authors. All rights reserved.
::
:: Licensed under the Apache License, Version 2.0 (the "License");
:: you may not use this file except in compliance with the License.
:: You may obtain a copy of the License at
::
:: http://www.apache.org/licenses/LICENSE-2.0
::
:: Unless required by applicable law or agreed to in writing, software
:: distributed under the License is distributed on an "AS IS" BASIS,
:: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
:: See the License for the specific language governing permissions and
:: limitations under the License.
@echo OFF
echo. 1>&2
echo The target you are compiling requires the Clang compiler. 1>&2
echo Bazel couldn't find a valid Clang installation on your machine. 1>&2
%{clang_error_message}
echo Please check your installation following https://docs.bazel.build/versions/main/windows.html#using 1>&2
echo. 1>&2
exit /b 1

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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
int main() {}

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# Copyright 2019 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A fake C++ toolchain configuration rule"""
def _impl(ctx):
out = ctx.actions.declare_file(ctx.label.name)
ctx.actions.write(out, "Fake executable")
return [
cc_common.create_cc_toolchain_config_info(
ctx = ctx,
toolchain_identifier = "local_linux",
host_system_name = "local",
target_system_name = "local",
target_cpu = "local",
target_libc = "local",
compiler = "compiler",
abi_version = "local",
abi_libc_version = "local",
),
DefaultInfo(
executable = out,
),
]
cc_toolchain_config = rule(
implementation = _impl,
attrs = {},
provides = [CcToolchainConfigInfo],
executable = True,
)

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# Copyright 2019 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A Starlark cc_toolchain configuration rule for freebsd."""
load("@rules_cc//cc:action_names.bzl", "ACTION_NAMES")
load(
"@rules_cc//cc:cc_toolchain_config_lib.bzl",
"action_config",
"feature",
"flag_group",
"flag_set",
"tool",
"tool_path",
"with_feature_set",
)
all_compile_actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.linkstamp_compile,
ACTION_NAMES.assemble,
ACTION_NAMES.preprocess_assemble,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
ACTION_NAMES.cpp_module_codegen,
ACTION_NAMES.clif_match,
ACTION_NAMES.lto_backend,
]
all_cpp_compile_actions = [
ACTION_NAMES.cpp_compile,
ACTION_NAMES.linkstamp_compile,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
ACTION_NAMES.cpp_module_codegen,
ACTION_NAMES.clif_match,
]
all_link_actions = [
ACTION_NAMES.cpp_link_executable,
ACTION_NAMES.cpp_link_dynamic_library,
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
]
def _impl(ctx):
cpu = ctx.attr.cpu
compiler = "compiler"
toolchain_identifier = "local_freebsd" if cpu == "freebsd" else "stub_armeabi-v7a"
host_system_name = "local" if cpu == "freebsd" else "armeabi-v7a"
target_system_name = "local" if cpu == "freebsd" else "armeabi-v7a"
target_libc = "local" if cpu == "freebsd" else "armeabi-v7a"
abi_version = "local" if cpu == "freebsd" else "armeabi-v7a"
abi_libc_version = "local" if cpu == "freebsd" else "armeabi-v7a"
objcopy_embed_data_action = action_config(
action_name = "objcopy_embed_data",
enabled = True,
tools = [tool(path = "/usr/bin/objcopy")],
)
action_configs = [objcopy_embed_data_action] if cpu == "freebsd" else []
default_link_flags_feature = feature(
name = "default_link_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_link_actions,
flag_groups = [
flag_group(
flags = [
"-lstdc++",
"-Wl,-z,relro,-z,now",
"-no-canonical-prefixes",
],
),
],
),
flag_set(
actions = all_link_actions,
flag_groups = [flag_group(flags = ["-Wl,--gc-sections"])],
with_features = [with_feature_set(features = ["opt"])],
),
],
)
unfiltered_compile_flags_feature = feature(
name = "unfiltered_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
flags = [
"-no-canonical-prefixes",
"-Wno-builtin-macro-redefined",
"-D__DATE__=\"redacted\"",
"-D__TIMESTAMP__=\"redacted\"",
"-D__TIME__=\"redacted\"",
],
),
],
),
],
)
supports_pic_feature = feature(name = "supports_pic", enabled = True)
default_compile_flags_feature = feature(
name = "default_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
flags = [
"-U_FORTIFY_SOURCE",
"-D_FORTIFY_SOURCE=1",
"-fstack-protector",
"-Wall",
"-fno-omit-frame-pointer",
],
),
],
),
flag_set(
actions = all_compile_actions,
flag_groups = [flag_group(flags = ["-g"])],
with_features = [with_feature_set(features = ["dbg"])],
),
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
flags = [
"-g0",
"-O2",
"-DNDEBUG",
"-ffunction-sections",
"-fdata-sections",
],
),
],
with_features = [with_feature_set(features = ["opt"])],
),
flag_set(
actions = all_cpp_compile_actions + [ACTION_NAMES.lto_backend],
flag_groups = [flag_group(flags = ["-std=c++0x"])],
),
],
)
opt_feature = feature(name = "opt")
supports_dynamic_linker_feature = feature(name = "supports_dynamic_linker", enabled = True)
objcopy_embed_flags_feature = feature(
name = "objcopy_embed_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ["objcopy_embed_data"],
flag_groups = [flag_group(flags = ["-I", "binary"])],
),
],
)
dbg_feature = feature(name = "dbg")
user_compile_flags_feature = feature(
name = "user_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
flags = ["%{user_compile_flags}"],
iterate_over = "user_compile_flags",
expand_if_available = "user_compile_flags",
),
],
),
],
)
sysroot_feature = feature(
name = "sysroot",
enabled = True,
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.linkstamp_compile,
ACTION_NAMES.preprocess_assemble,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
ACTION_NAMES.cpp_module_codegen,
ACTION_NAMES.clif_match,
ACTION_NAMES.lto_backend,
] + all_link_actions,
flag_groups = [
flag_group(
flags = ["--sysroot=%{sysroot}"],
expand_if_available = "sysroot",
),
],
),
],
)
if cpu == "freebsd":
features = [
default_compile_flags_feature,
default_link_flags_feature,
supports_dynamic_linker_feature,
supports_pic_feature,
objcopy_embed_flags_feature,
opt_feature,
dbg_feature,
user_compile_flags_feature,
sysroot_feature,
unfiltered_compile_flags_feature,
]
else:
features = [supports_dynamic_linker_feature, supports_pic_feature]
if (cpu == "freebsd"):
cxx_builtin_include_directories = ["/usr/lib/clang", "/usr/local/include", "/usr/include"]
else:
cxx_builtin_include_directories = []
if cpu == "freebsd":
tool_paths = [
tool_path(name = "ar", path = "/usr/bin/ar"),
tool_path(name = "compat-ld", path = "/usr/bin/ld"),
tool_path(name = "cpp", path = "/usr/bin/cpp"),
tool_path(name = "dwp", path = "/usr/bin/dwp"),
tool_path(name = "gcc", path = "/usr/bin/clang"),
tool_path(name = "gcov", path = "/usr/bin/gcov"),
tool_path(name = "ld", path = "/usr/bin/ld"),
tool_path(name = "nm", path = "/usr/bin/nm"),
tool_path(name = "objcopy", path = "/usr/bin/objcopy"),
tool_path(name = "objdump", path = "/usr/bin/objdump"),
tool_path(name = "strip", path = "/usr/bin/strip"),
]
else:
tool_paths = [
tool_path(name = "ar", path = "/bin/false"),
tool_path(name = "compat-ld", path = "/bin/false"),
tool_path(name = "cpp", path = "/bin/false"),
tool_path(name = "dwp", path = "/bin/false"),
tool_path(name = "gcc", path = "/bin/false"),
tool_path(name = "gcov", path = "/bin/false"),
tool_path(name = "ld", path = "/bin/false"),
tool_path(name = "nm", path = "/bin/false"),
tool_path(name = "objcopy", path = "/bin/false"),
tool_path(name = "objdump", path = "/bin/false"),
tool_path(name = "strip", path = "/bin/false"),
]
out = ctx.actions.declare_file(ctx.label.name)
ctx.actions.write(out, "Fake executable")
return [
cc_common.create_cc_toolchain_config_info(
ctx = ctx,
features = features,
action_configs = action_configs,
cxx_builtin_include_directories = cxx_builtin_include_directories,
toolchain_identifier = toolchain_identifier,
host_system_name = host_system_name,
target_system_name = target_system_name,
target_cpu = cpu,
target_libc = target_libc,
compiler = compiler,
abi_version = abi_version,
abi_libc_version = abi_libc_version,
tool_paths = tool_paths,
),
DefaultInfo(
executable = out,
),
]
cc_toolchain_config = rule(
implementation = _impl,
attrs = {
"cpu": attr.string(mandatory = True),
},
provides = [CcToolchainConfigInfo],
executable = True,
)

19
cc/private/toolchain/grep-includes.sh Executable file
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#!/bin/bash
#
# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# TODO(bazel-team): Support include scanning and grep-includes in Bazel
echo "grep-includes is not supported by Bazel"
exit 1

286
cc/private/toolchain/lib_cc_configure.bzl Normal file
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# pylint: disable=g-bad-file-header
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Base library for configuring the C++ toolchain."""
def resolve_labels(repository_ctx, labels):
"""Resolves a collection of labels to their paths.
Label resolution can cause the evaluation of Starlark functions to restart.
For functions with side-effects (like the auto-configuration functions, which
inspect the system and touch the file system), such restarts are costly.
We cannot avoid the restarts, but we can minimize their penalty by resolving
all labels upfront.
Among other things, doing less work on restarts can cut analysis times by
several seconds and may also prevent tickling kernel conditions that cause
build failures. See https://github.com/bazelbuild/bazel/issues/5196 for
more details.
Args:
repository_ctx: The context with which to resolve the labels.
labels: Labels to be resolved expressed as a list of strings.
Returns:
A dictionary with the labels as keys and their paths as values.
"""
return dict([(label, repository_ctx.path(Label(label))) for label in labels])
def escape_string(arg):
"""Escape percent sign (%) in the string so it can appear in the Crosstool."""
if arg != None:
return str(arg).replace("%", "%%")
else:
return None
def split_escaped(string, delimiter):
"""Split string on the delimiter unless %-escaped.
Examples:
Basic usage:
split_escaped("a:b:c", ":") -> [ "a", "b", "c" ]
Delimeter that is not supposed to be splitten on has to be %-escaped:
split_escaped("a%:b", ":") -> [ "a:b" ]
Literal % can be represented by escaping it as %%:
split_escaped("a%%b", ":") -> [ "a%b" ]
Consecutive delimiters produce empty strings:
split_escaped("a::b", ":") -> [ "a", "", "", "b" ]
Args:
string: The string to be split.
delimiter: Non-empty string not containing %-sign to be used as a
delimiter.
Returns:
A list of substrings.
"""
if delimiter == "":
fail("Delimiter cannot be empty")
if delimiter.find("%") != -1:
fail("Delimiter cannot contain %-sign")
i = 0
result = []
accumulator = []
length = len(string)
delimiter_length = len(delimiter)
if not string:
return []
# Iterate over the length of string since Starlark doesn't have while loops
for _ in range(length):
if i >= length:
break
if i + 2 <= length and string[i:i + 2] == "%%":
accumulator.append("%")
i += 2
elif (i + 1 + delimiter_length <= length and
string[i:i + 1 + delimiter_length] == "%" + delimiter):
accumulator.append(delimiter)
i += 1 + delimiter_length
elif i + delimiter_length <= length and string[i:i + delimiter_length] == delimiter:
result.append("".join(accumulator))
accumulator = []
i += delimiter_length
else:
accumulator.append(string[i])
i += 1
# Append the last group still in accumulator
result.append("".join(accumulator))
return result
def auto_configure_fail(msg):
"""Output failure message when auto configuration fails."""
red = "\033[0;31m"
no_color = "\033[0m"
fail("\n%sAuto-Configuration Error:%s %s\n" % (red, no_color, msg))
def auto_configure_warning(msg):
"""Output warning message during auto configuration."""
yellow = "\033[1;33m"
no_color = "\033[0m"
# buildifier: disable=print
print("\n%sAuto-Configuration Warning:%s %s\n" % (yellow, no_color, msg))
def get_env_var(repository_ctx, name, default = None, enable_warning = True):
"""Find an environment variable in system path. Doesn't %-escape the value!
Args:
repository_ctx: The repository context.
name: Name of the environment variable.
default: Default value to be used when such environment variable is not present.
enable_warning: Show warning if the variable is not present.
Returns:
value of the environment variable or default.
"""
if name in repository_ctx.os.environ:
return repository_ctx.os.environ[name]
if default != None:
if enable_warning:
auto_configure_warning("'%s' environment variable is not set, using '%s' as default" % (name, default))
return default
return auto_configure_fail("'%s' environment variable is not set" % name)
def which(repository_ctx, cmd, default = None):
"""A wrapper around repository_ctx.which() to provide a fallback value. Doesn't %-escape the value!
Args:
repository_ctx: The repository context.
cmd: name of the executable to resolve.
default: Value to be returned when such executable couldn't be found.
Returns:
absolute path to the cmd or default when not found.
"""
result = repository_ctx.which(cmd)
return default if result == None else str(result)
def which_cmd(repository_ctx, cmd, default = None):
"""Find cmd in PATH using repository_ctx.which() and fail if cannot find it. Doesn't %-escape the cmd!
Args:
repository_ctx: The repository context.
cmd: name of the executable to resolve.
default: Value to be returned when such executable couldn't be found.
Returns:
absolute path to the cmd or default when not found.
"""
result = repository_ctx.which(cmd)
if result != None:
return str(result)
path = get_env_var(repository_ctx, "PATH")
if default != None:
auto_configure_warning("Cannot find %s in PATH, using '%s' as default.\nPATH=%s" % (cmd, default, path))
return default
auto_configure_fail("Cannot find %s in PATH, please make sure %s is installed and add its directory in PATH.\nPATH=%s" % (cmd, cmd, path))
return str(result)
def execute(
repository_ctx,
command,
environment = None,
expect_failure = False):
"""Execute a command, return stdout if succeed and throw an error if it fails. Doesn't %-escape the result!
Args:
repository_ctx: The repository context.
command: command to execute.
environment: dictionary with environment variables to set for the command.
expect_failure: True if the command is expected to fail.
Returns:
stdout of the executed command.
"""
if environment:
result = repository_ctx.execute(command, environment = environment)
else:
result = repository_ctx.execute(command)
if expect_failure != (result.return_code != 0):
if expect_failure:
auto_configure_fail(
"expected failure, command %s, stderr: (%s)" % (
command,
result.stderr,
),
)
else:
auto_configure_fail(
"non-zero exit code: %d, command %s, stderr: (%s)" % (
result.return_code,
command,
result.stderr,
),
)
stripped_stdout = result.stdout.strip()
if not stripped_stdout:
auto_configure_fail(
"empty output from command %s, stderr: (%s)" % (command, result.stderr),
)
return stripped_stdout
def get_cpu_value(repository_ctx):
"""Compute the cpu_value based on the OS name. Doesn't %-escape the result!
Args:
repository_ctx: The repository context.
Returns:
One of (darwin, freebsd, x64_windows, ppc, s390x, arm, aarch64, k8, piii)
"""
os_name = repository_ctx.os.name.lower()
if os_name.startswith("mac os"):
return "darwin"
if os_name.find("freebsd") != -1:
return "freebsd"
if os_name.find("windows") != -1:
return "x64_windows"
# Use uname to figure out whether we are on x86_32 or x86_64
result = repository_ctx.execute(["uname", "-m"])
if result.stdout.strip() in ["power", "ppc64le", "ppc", "ppc64"]:
return "ppc"
if result.stdout.strip() in ["s390x"]:
return "s390x"
if result.stdout.strip() in ["arm", "armv7l"]:
return "arm"
if result.stdout.strip() in ["aarch64"]:
return "aarch64"
return "k8" if result.stdout.strip() in ["amd64", "x86_64", "x64"] else "piii"
def is_cc_configure_debug(repository_ctx):
"""Returns True if CC_CONFIGURE_DEBUG is set to 1."""
env = repository_ctx.os.environ
return "CC_CONFIGURE_DEBUG" in env and env["CC_CONFIGURE_DEBUG"] == "1"
def build_flags(flags):
"""Convert `flags` to a string of flag fields."""
return "\n".join([" flag: '" + flag + "'" for flag in flags])
def get_starlark_list(values):
"""Convert a list of string into a string that can be passed to a rule attribute."""
if not values:
return ""
return "\"" + "\",\n \"".join(values) + "\""
def auto_configure_warning_maybe(repository_ctx, msg):
"""Output warning message when CC_CONFIGURE_DEBUG is enabled."""
if is_cc_configure_debug(repository_ctx):
auto_configure_warning(msg)
def write_builtin_include_directory_paths(repository_ctx, cc, directories, file_suffix = ""):
"""Generate output file named 'builtin_include_directory_paths' in the root of the repository."""
if get_env_var(repository_ctx, "BAZEL_IGNORE_SYSTEM_HEADERS_VERSIONS", "0", False) == "1":
repository_ctx.file(
"builtin_include_directory_paths" + file_suffix,
"""This file is generated by cc_configure and normally contains builtin include directories
that C++ compiler reported. But because BAZEL_IGNORE_SYSTEM_HEADERS_VERSIONS was set to 1,
header include directory paths are intentionally not put there.
""",
)
else:
repository_ctx.file(
"builtin_include_directory_paths" + file_suffix,
"""This file is generated by cc_configure and contains builtin include directories
that %s reported. This file is a dependency of every compilation action and
changes to it will be reflected in the action cache key. When some of these
paths change, Bazel will make sure to rerun the action, even though none of
declared action inputs or the action commandline changes.
%s
""" % (cc, "\n".join(directories)),
)

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// Copyright 2020 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <regex> // NOLINT
#include <unordered_set>
using std::ifstream;
using std::regex;
using std::string;
using std::unordered_set;
using std::vector;
const regex libRegex = regex(".*\\.a$");
const regex noArgFlags =
regex("-static|-s|-a|-c|-L|-T|-D|-no_warning_for_no_symbols");
const regex singleArgFlags = regex("-arch_only|-syslibroot|-o");
string getBasename(const string &path) {
// Assumes we're on an OS with "/" as the path separator
auto idx = path.find_last_of("/");
if (idx == string::npos) {
return path;
}
return path.substr(idx + 1);
}
vector<string> readFile(const string path) {
vector<string> lines;
ifstream file(path);
string line;
while (std::getline(file, line)) {
if (!line.empty()) {
lines.push_back(line);
}
}
return lines;
}
unordered_set<string> parseArgs(vector<string> args) {
unordered_set<string> basenames;
for (auto it = args.begin(); it != args.end(); ++it) {
const string arg = *it;
if (arg == "-filelist") {
++it;
ifstream list(*it);
for (string line; getline(list, line);) {
const string basename = getBasename(line);
const auto pair = basenames.insert(basename);
if (!pair.second) {
exit(EXIT_FAILURE);
}
}
list.close();
} else if (arg[0] == '@') {
string paramsFilePath(arg.substr(1));
auto newBasenames = parseArgs(readFile(paramsFilePath));
for (auto newBasename : newBasenames) {
const auto pair = basenames.insert(newBasename);
if (!pair.second) {
exit(EXIT_FAILURE);
}
}
} else if (regex_match(arg, noArgFlags)) {
} else if (regex_match(arg, singleArgFlags)) {
++it;
} else if (arg[0] == '-') {
exit(EXIT_FAILURE);
// Unrecognized flag, let the wrapper deal with it, any flags added to
// libtool.sh should also be added here.
} else if (regex_match(arg, libRegex)) {
// Archive inputs can remain untouched, as they come from other targets.
} else {
const string basename = getBasename(arg);
const auto pair = basenames.insert(basename);
if (!pair.second) {
exit(EXIT_FAILURE);
}
}
}
return basenames;
}
// Returns 0 if there are no duplicate basenames in the object files (via
// -filelist, params files, and shell args), 1 otherwise
int main(int argc, const char *argv[]) {
vector<string> args;
// Set i to 1 to skip executable path
for (int i = 1; argv[i] != nullptr; i++) {
args.push_back(argv[i]);
}
parseArgs(args);
return EXIT_SUCCESS;
}

113
cc/private/toolchain/link_dynamic_library.sh Executable file
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#!/bin/bash
#
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This script handles interface library generation for dynamic library
# link action.
#
# Bazel can be configured to generate external interface library script
# to generate interface libraries in CppLinkAction for dynamic libraries.
# This is not needed on Windows (as the "interface" libraries are
# generated by default). This script therefore handles the cases when
# external script is provided, or when no script should be used.
set -eu
E_LINKER_COMMAND_NOT_FOUND=12
E_INTERFACE_BUILDER_NOT_FOUND=13
SUFFIX=".rewritten"
other_args=""
if [[ "$#" -eq 1 ]]; then
if [[ "$1" != @* ]]; then
echo "Parameter file must start with @" 1>&2;
exit "$E_LINKER_COMMAND_NOT_FOUND"
fi
filename=$(echo "$1" | cut -c2-)
first_five_lines=$(head -n 5 $filename)
# Should generate interface library switch (<yes|no>); if the value is "no",
# following 3 args are ignored (but must be present)
GENERATE_INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n1 | tail -n1)
# Tool which can generate interface library from dynamic library file
INTERFACE_LIBRARY_BUILDER=$(echo "$first_five_lines" | head -n2 | tail -n1)
# Dynamic library from which we want to generate interface library
DYNAMIC_LIBRARY=$(echo "$first_five_lines" | head -n3 | tail -n1)
# Resulting interface library
INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n4 | tail -n1)
# The command used to generate the dynamic library
LINKER_COMMAND=$(echo "$first_five_lines" | head -n5 | tail -n1)
rest_of_lines=$(tail -n +6 $filename)
new_param_file="${filename}${SUFFIX}"
echo "$rest_of_lines" > $new_param_file
other_args="@$new_param_file"
if [[ ! -e "$LINKER_COMMAND" ]]; then
echo "Linker command ($LINKER_COMMAND) not found." 1>&2;
exit "$E_LINKER_COMMAND_NOT_FOUND"
fi
if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then
INTERFACE_GENERATION=:
else
if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then
echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER)
not found." 1>&2;
exit "$E_INTERFACE_BUILDER_NOT_FOUND"
fi
INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY}
${INTERFACE_LIBRARY}"
fi
${LINKER_COMMAND} "$other_args" && ${INTERFACE_GENERATION}
else
# TODO(b/113358321): Remove this branch once projects are migrated to not
# splitting the linking command line.
# Should generate interface library switch (<yes|no>); if the value is "no",
# following 3 args are ignored (but must be present)
GENERATE_INTERFACE_LIBRARY="$1"
# Tool which can generate interface library from dynamic library file
INTERFACE_LIBRARY_BUILDER="$2"
# Dynamic library from which we want to generate interface library
DYNAMIC_LIBRARY="$3"
# Resulting interface library
INTERFACE_LIBRARY="$4"
# The command used to generate the dynamic library
LINKER_COMMAND="$5"
shift 5
if [[ ! -e "$LINKER_COMMAND" ]]; then
echo "Linker command ($LINKER_COMMAND) not found." 1>&2;
exit "$E_LINKER_COMMAND_NOT_FOUND"
fi
if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then
INTERFACE_GENERATION=:
else
if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then
echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER)
not found." 1>&2;
exit "$E_INTERFACE_BUILDER_NOT_FOUND"
fi
INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY}
${INTERFACE_LIBRARY}"
fi
${LINKER_COMMAND} "$@" && ${INTERFACE_GENERATION}
fi

25
cc/private/toolchain/linux_cc_wrapper.sh.tpl Normal file
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#!/bin/bash
#
# Copyright 2015 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Ship the environment to the C++ action
#
set -eu
# Set-up the environment
%{env}
# Call the C++ compiler
%{cc} "$@"

23
cc/private/toolchain/msys_gcc_installation_error.bat Normal file
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@ -0,0 +1,23 @@
:: Copyright 2018 The Bazel Authors. All rights reserved.
::
:: Licensed under the Apache License, Version 2.0 (the "License");
:: you may not use this file except in compliance with the License.
:: You may obtain a copy of the License at
::
:: http://www.apache.org/licenses/LICENSE-2.0
::
:: Unless required by applicable law or agreed to in writing, software
:: distributed under the License is distributed on an "AS IS" BASIS,
:: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
:: See the License for the specific language governing permissions and
:: limitations under the License.
@echo OFF
echo. 1>&2
echo The target you are compiling requires MSYS gcc / MINGW gcc. 1>&2
echo Bazel couldn't find gcc installation on your machine. 1>&2
echo Please install MSYS gcc / MINGW gcc and set BAZEL_SH environment variable 1>&2
echo. 1>&2
exit /b 1

184
cc/private/toolchain/osx_cc_configure.bzl Normal file
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# pylint: disable=g-bad-file-header
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Configuring the C++ toolchain on macOS."""
load("@bazel_tools//tools/osx:xcode_configure.bzl", "run_xcode_locator")
load(
":lib_cc_configure.bzl",
"escape_string",
"resolve_labels",
"write_builtin_include_directory_paths",
)
load(
":unix_cc_configure.bzl",
"configure_unix_toolchain",
"get_env",
"get_escaped_cxx_inc_directories",
)
def _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains):
"""Compute the list of default C++ include paths on Xcode-enabled darwin.
Args:
repository_ctx: The repository context.
cc: The default C++ compiler on the local system.
xcode_toolchains: A list containing the xcode toolchains available
Returns:
include_paths: A list of builtin include paths.
"""
# TODO(cparsons): Falling back to the default C++ compiler builtin include
# paths shouldn't be unnecessary once all actions are using xcrun.
include_dirs = get_escaped_cxx_inc_directories(repository_ctx, cc, "-xc++")
for toolchain in xcode_toolchains:
include_dirs.append(escape_string(toolchain.developer_dir))
# Assume that all paths that point to /Applications/ are built in include paths
include_dirs.append("/Applications/")
return include_dirs
def compile_cc_file(repository_ctx, src_name, out_name):
xcrun_result = repository_ctx.execute([
"env",
"-i",
"xcrun",
"--sdk",
"macosx",
"clang",
"-mmacosx-version-min=10.9",
"-std=c++11",
"-lc++",
"-o",
out_name,
src_name,
], 30)
if (xcrun_result.return_code != 0):
error_msg = (
"return code {code}, stderr: {err}, stdout: {out}"
).format(
code = xcrun_result.return_code,
err = xcrun_result.stderr,
out = xcrun_result.stdout,
)
fail(out_name + " failed to generate. Please file an issue at " +
"https://github.com/bazelbuild/bazel/issues with the following:\n" +
error_msg)
def configure_osx_toolchain(repository_ctx, overriden_tools):
"""Configure C++ toolchain on macOS.
Args:
repository_ctx: The repository context.
overriden_tools: dictionary of overriden tools.
"""
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl",
"@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl",
"@rules_cc//cc/private/toolchain:libtool_check_unique.cc",
"@bazel_tools//tools/objc:libtool.sh",
"@bazel_tools//tools/objc:make_hashed_objlist.py",
"@bazel_tools//tools/objc:xcrunwrapper.sh",
"@bazel_tools//tools/osx/crosstool:BUILD.tpl",
"@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl",
"@bazel_tools//tools/osx/crosstool:wrapped_clang.cc",
"@bazel_tools//tools/osx:xcode_locator.m",
])
env = repository_ctx.os.environ
should_use_xcode = "BAZEL_USE_XCODE_TOOLCHAIN" in env and env["BAZEL_USE_XCODE_TOOLCHAIN"] == "1"
xcode_toolchains = []
# Make the following logic in sync with @rules_cc//cc/private/toolchain:cc_configure.bzl#cc_autoconf_toolchains_impl
(xcode_toolchains, xcodeloc_err) = run_xcode_locator(
repository_ctx,
paths["@bazel_tools//tools/osx:xcode_locator.m"],
)
if should_use_xcode and not xcode_toolchains:
fail("BAZEL_USE_XCODE_TOOLCHAIN is set to 1 but Bazel couldn't find Xcode installed on the " +
"system. Verify that 'xcode-select -p' is correct.")
if xcode_toolchains:
# For Xcode toolchains, there's no reason to use anything other than
# wrapped_clang, so that we still get the Bazel Xcode placeholder
# substitution and other behavior for actions that invoke this
# cc_wrapper.sh script. The wrapped_clang binary is already hardcoded
# into the Objective-C crosstool actions, anyway, so this ensures that
# the C++ actions behave consistently.
cc = repository_ctx.path("wrapped_clang")
cc_path = '"$(/usr/bin/dirname "$0")"/wrapped_clang'
repository_ctx.template(
"cc_wrapper.sh",
paths["@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl"],
{
"%{cc}": escape_string(cc_path),
"%{env}": escape_string(get_env(repository_ctx)),
},
)
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl"],
"armeabi_cc_toolchain_config.bzl",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/objc:xcrunwrapper.sh"],
"xcrunwrapper.sh",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/objc:libtool.sh"],
"libtool",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/objc:make_hashed_objlist.py"],
"make_hashed_objlist.py",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl"],
"cc_toolchain_config.bzl",
)
libtool_check_unique_src_path = str(repository_ctx.path(
paths["@rules_cc//cc/private/toolchain:libtool_check_unique.cc"],
))
compile_cc_file(repository_ctx, libtool_check_unique_src_path, "libtool_check_unique")
wrapped_clang_src_path = str(repository_ctx.path(
paths["@bazel_tools//tools/osx/crosstool:wrapped_clang.cc"],
))
compile_cc_file(repository_ctx, wrapped_clang_src_path, "wrapped_clang")
repository_ctx.symlink("wrapped_clang", "wrapped_clang_pp")
tool_paths = {}
gcov_path = repository_ctx.os.environ.get("GCOV")
if gcov_path != None:
if not gcov_path.startswith("/"):
gcov_path = repository_ctx.which(gcov_path)
tool_paths["gcov"] = gcov_path
escaped_include_paths = _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains)
write_builtin_include_directory_paths(repository_ctx, cc, escaped_include_paths)
escaped_cxx_include_directories = []
for path in escaped_include_paths:
escaped_cxx_include_directories.append((" \"%s\"," % path))
if xcodeloc_err:
escaped_cxx_include_directories.append("# Error: " + xcodeloc_err + "\n")
repository_ctx.template(
"BUILD",
paths["@bazel_tools//tools/osx/crosstool:BUILD.tpl"],
{
"%{cxx_builtin_include_directories}": "\n".join(escaped_cxx_include_directories),
"%{tool_paths_overrides}": ",\n ".join(
['"%s": "%s"' % (k, v) for k, v in tool_paths.items()],
),
},
)
else:
configure_unix_toolchain(repository_ctx, cpu_value = "darwin", overriden_tools = overriden_tools)

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#!/bin/bash
#
# Copyright 2015 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# OS X relpath is not really working. This is a wrapper script around gcc
# to simulate relpath behavior.
#
# This wrapper uses install_name_tool to replace all paths in the binary
# (bazel-out/.../path/to/original/library.so) by the paths relative to
# the binary. It parses the command line to behave as rpath is supposed
# to work.
#
# See https://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac
# on how to set those paths for Mach-O binaries.
#
set -eu
GCC=/usr/bin/gcc
INSTALL_NAME_TOOL="/usr/bin/install_name_tool"
LIBS=
LIB_DIRS=
RPATHS=
OUTPUT=
function parse_option() {
local -r opt="$1"
if [[ "${OUTPUT}" = "1" ]]; then
OUTPUT=$opt
elif [[ "$opt" =~ ^-l(.*)$ ]]; then
LIBS="${BASH_REMATCH[1]} $LIBS"
elif [[ "$opt" =~ ^-L(.*)$ ]]; then
LIB_DIRS="${BASH_REMATCH[1]} $LIB_DIRS"
elif [[ "$opt" =~ ^-Wl,-rpath,\@loader_path/(.*)$ ]]; then
RPATHS="${BASH_REMATCH[1]} ${RPATHS}"
elif [[ "$opt" = "-o" ]]; then
# output is coming
OUTPUT=1
fi
}
# let parse the option list
for i in "$@"; do
if [[ "$i" = @* ]]; then
while IFS= read -r opt
do
parse_option "$opt"
done < "${i:1}" || exit 1
else
parse_option "$i"
fi
done
# Call gcc
${GCC} "$@"
function get_library_path() {
for libdir in ${LIB_DIRS}; do
if [ -f ${libdir}/lib$1.so ]; then
echo "${libdir}/lib$1.so"
elif [ -f ${libdir}/lib$1.dylib ]; then
echo "${libdir}/lib$1.dylib"
fi
done
}
# A convenient method to return the actual path even for non symlinks
# and multi-level symlinks.
function get_realpath() {
local previous="$1"
local next=$(readlink "${previous}")
while [ -n "${next}" ]; do
previous="${next}"
next=$(readlink "${previous}")
done
echo "${previous}"
}
# Get the path of a lib inside a tool
function get_otool_path() {
# the lib path is the path of the original lib relative to the workspace
get_realpath $1 | sed 's|^.*/bazel-out/|bazel-out/|'
}
# Do replacements in the output
for rpath in ${RPATHS}; do
for lib in ${LIBS}; do
unset libname
if [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.so" ]; then
libname="lib${lib}.so"
elif [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.dylib" ]; then
libname="lib${lib}.dylib"
fi
# ${libname-} --> return $libname if defined, or undefined otherwise. This is to make
# this set -e friendly
if [[ -n "${libname-}" ]]; then
libpath=$(get_library_path ${lib})
if [ -n "${libpath}" ]; then
${INSTALL_NAME_TOOL} -change $(get_otool_path "${libpath}") \
"@loader_path/${rpath}/${libname}" "${OUTPUT}"
fi
fi
done
done

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#!/bin/bash
#
# Copyright 2015 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# OS X relpath is not really working. This is a wrapper script around gcc
# to simulate relpath behavior.
#
# This wrapper uses install_name_tool to replace all paths in the binary
# (bazel-out/.../path/to/original/library.so) by the paths relative to
# the binary. It parses the command line to behave as rpath is supposed
# to work.
#
# See https://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac
# on how to set those paths for Mach-O binaries.
#
set -eu
INSTALL_NAME_TOOL="/usr/bin/install_name_tool"
LIBS=
LIB_DIRS=
RPATHS=
OUTPUT=
function parse_option() {
local -r opt="$1"
if [[ "${OUTPUT}" = "1" ]]; then
OUTPUT=$opt
elif [[ "$opt" =~ ^-l(.*)$ ]]; then
LIBS="${BASH_REMATCH[1]} $LIBS"
elif [[ "$opt" =~ ^-L(.*)$ ]]; then
LIB_DIRS="${BASH_REMATCH[1]} $LIB_DIRS"
elif [[ "$opt" =~ ^-Wl,-rpath,\@loader_path/(.*)$ ]]; then
RPATHS="${BASH_REMATCH[1]} ${RPATHS}"
elif [[ "$opt" = "-o" ]]; then
# output is coming
OUTPUT=1
fi
}
# let parse the option list
for i in "$@"; do
if [[ "$i" = @* ]]; then
while IFS= read -r opt
do
parse_option "$opt"
done < "${i:1}" || exit 1
else
parse_option "$i"
fi
done
# Set-up the environment
%{env}
# Call the C++ compiler
%{cc} "$@"
function get_library_path() {
for libdir in ${LIB_DIRS}; do
if [ -f ${libdir}/lib$1.so ]; then
echo "${libdir}/lib$1.so"
elif [ -f ${libdir}/lib$1.dylib ]; then
echo "${libdir}/lib$1.dylib"
fi
done
}
# A convenient method to return the actual path even for non symlinks
# and multi-level symlinks.
function get_realpath() {
local previous="$1"
local next=$(readlink "${previous}")
while [ -n "${next}" ]; do
previous="${next}"
next=$(readlink "${previous}")
done
echo "${previous}"
}
# Get the path of a lib inside a tool
function get_otool_path() {
# the lib path is the path of the original lib relative to the workspace
get_realpath $1 | sed 's|^.*/bazel-out/|bazel-out/|'
}
# Do replacements in the output
for rpath in ${RPATHS}; do
for lib in ${LIBS}; do
unset libname
if [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.so" ]; then
libname="lib${lib}.so"
elif [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.dylib" ]; then
libname="lib${lib}.dylib"
fi
# ${libname-} --> return $libname if defined, or undefined otherwise. This is to make
# this set -e friendly
if [[ -n "${libname-}" ]]; then
libpath=$(get_library_path ${lib})
if [ -n "${libpath}" ]; then
${INSTALL_NAME_TOOL} -change $(get_otool_path "${libpath}") \
"@loader_path/${rpath}/${libname}" "${OUTPUT}"
fi
fi
done
done

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# pylint: disable=g-bad-file-header
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Configuring the C++ toolchain on Unix platforms."""
load(
":lib_cc_configure.bzl",
"auto_configure_fail",
"auto_configure_warning",
"auto_configure_warning_maybe",
"escape_string",
"get_env_var",
"get_starlark_list",
"resolve_labels",
"split_escaped",
"which",
"write_builtin_include_directory_paths",
)
def _uniq(iterable):
"""Remove duplicates from a list."""
unique_elements = {element: None for element in iterable}
return unique_elements.keys()
def _prepare_include_path(repo_ctx, path):
"""Resolve and sanitize include path before outputting it into the crosstool.
Args:
repo_ctx: repository_ctx object.
path: an include path to be sanitized.
Returns:
Sanitized include path that can be written to the crosstoot. Resulting path
is absolute if it is outside the repository and relative otherwise.
"""
repo_root = str(repo_ctx.path("."))
# We're on UNIX, so the path delimiter is '/'.
repo_root += "/"
path = str(repo_ctx.path(path))
if path.startswith(repo_root):
return escape_string(path[len(repo_root):])
return escape_string(path)
def _find_tool(repository_ctx, tool, overriden_tools):
"""Find a tool for repository, taking overriden tools into account."""
if tool in overriden_tools:
return overriden_tools[tool]
return which(repository_ctx, tool, "/usr/bin/" + tool)
def _get_tool_paths(repository_ctx, overriden_tools):
"""Compute the %-escaped path to the various tools"""
return dict({
k: escape_string(_find_tool(repository_ctx, k, overriden_tools))
for k in [
"ar",
"ld",
"cpp",
"gcc",
"dwp",
"gcov",
"nm",
"objcopy",
"objdump",
"strip",
]
}.items())
def _escaped_cplus_include_paths(repository_ctx):
"""Use ${CPLUS_INCLUDE_PATH} to compute the %-escaped list of flags for cxxflag."""
if "CPLUS_INCLUDE_PATH" in repository_ctx.os.environ:
result = []
for p in repository_ctx.os.environ["CPLUS_INCLUDE_PATH"].split(":"):
p = escape_string(str(repository_ctx.path(p))) # Normalize the path
result.append("-I" + p)
return result
else:
return []
_INC_DIR_MARKER_BEGIN = "#include <...>"
# OSX add " (framework directory)" at the end of line, strip it.
_OSX_FRAMEWORK_SUFFIX = " (framework directory)"
_OSX_FRAMEWORK_SUFFIX_LEN = len(_OSX_FRAMEWORK_SUFFIX)
def _cxx_inc_convert(path):
"""Convert path returned by cc -E xc++ in a complete path. Doesn't %-escape the path!"""
path = path.strip()
if path.endswith(_OSX_FRAMEWORK_SUFFIX):
path = path[:-_OSX_FRAMEWORK_SUFFIX_LEN].strip()
return path
def get_escaped_cxx_inc_directories(repository_ctx, cc, lang_flag, additional_flags = []):
"""Compute the list of default %-escaped C++ include directories.
Args:
repository_ctx: The repository context.
cc: path to the C compiler.
lang_flag: value for the language flag (c, c++).
additional_flags: additional flags to pass to cc.
Returns:
a list of escaped system include directories.
"""
result = repository_ctx.execute([cc, "-E", lang_flag, "-", "-v"] + additional_flags)
index1 = result.stderr.find(_INC_DIR_MARKER_BEGIN)
if index1 == -1:
return []
index1 = result.stderr.find("\n", index1)
if index1 == -1:
return []
index2 = result.stderr.rfind("\n ")
if index2 == -1 or index2 < index1:
return []
index2 = result.stderr.find("\n", index2 + 1)
if index2 == -1:
inc_dirs = result.stderr[index1 + 1:]
else:
inc_dirs = result.stderr[index1 + 1:index2].strip()
inc_directories = [
_prepare_include_path(repository_ctx, _cxx_inc_convert(p))
for p in inc_dirs.split("\n")
]
if _is_compiler_option_supported(repository_ctx, cc, "-print-resource-dir"):
resource_dir = repository_ctx.execute(
[cc, "-print-resource-dir"],
).stdout.strip() + "/share"
inc_directories.append(_prepare_include_path(repository_ctx, resource_dir))
return inc_directories
def _is_compiler_option_supported(repository_ctx, cc, option):
"""Checks that `option` is supported by the C compiler. Doesn't %-escape the option."""
result = repository_ctx.execute([
cc,
option,
"-o",
"/dev/null",
"-c",
str(repository_ctx.path("tools/cpp/empty.cc")),
])
return result.stderr.find(option) == -1
def _is_linker_option_supported(repository_ctx, cc, option, pattern):
"""Checks that `option` is supported by the C linker. Doesn't %-escape the option."""
result = repository_ctx.execute([
cc,
option,
"-o",
"/dev/null",
str(repository_ctx.path("tools/cpp/empty.cc")),
])
return result.stderr.find(pattern) == -1
def _find_gold_linker_path(repository_ctx, cc):
"""Checks if `gold` is supported by the C compiler.
Args:
repository_ctx: repository_ctx.
cc: path to the C compiler.
Returns:
String to put as value to -fuse-ld= flag, or None if gold couldn't be found.
"""
result = repository_ctx.execute([
cc,
str(repository_ctx.path("tools/cpp/empty.cc")),
"-o",
"/dev/null",
# Some macos clang versions don't fail when setting -fuse-ld=gold, adding
# these lines to force it to. This also means that we will not detect
# gold when only a very old (year 2010 and older) is present.
"-Wl,--start-lib",
"-Wl,--end-lib",
"-fuse-ld=gold",
"-v",
])
if result.return_code != 0:
return None
for line in result.stderr.splitlines():
if line.find("gold") == -1:
continue
for flag in line.split(" "):
if flag.find("gold") == -1:
continue
if flag.find("--enable-gold") > -1 or flag.find("--with-plugin-ld") > -1:
# skip build configuration options of gcc itself
# TODO(hlopko): Add redhat-like worker on the CI (#9392)
continue
# flag is '-fuse-ld=gold' for GCC or "/usr/lib/ld.gold" for Clang
# strip space, single quote, and double quotes
flag = flag.strip(" \"'")
# remove -fuse-ld= from GCC output so we have only the flag value part
flag = flag.replace("-fuse-ld=", "")
return flag
auto_configure_warning(
"CC with -fuse-ld=gold returned 0, but its -v output " +
"didn't contain 'gold', falling back to the default linker.",
)
return None
def _add_compiler_option_if_supported(repository_ctx, cc, option):
"""Returns `[option]` if supported, `[]` otherwise. Doesn't %-escape the option."""
return [option] if _is_compiler_option_supported(repository_ctx, cc, option) else []
def _add_linker_option_if_supported(repository_ctx, cc, option, pattern):
"""Returns `[option]` if supported, `[]` otherwise. Doesn't %-escape the option."""
return [option] if _is_linker_option_supported(repository_ctx, cc, option, pattern) else []
def _get_no_canonical_prefixes_opt(repository_ctx, cc):
# If the compiler sometimes rewrites paths in the .d files without symlinks
# (ie when they're shorter), it confuses Bazel's logic for verifying all
# #included header files are listed as inputs to the action.
# The '-fno-canonical-system-headers' should be enough, but clang does not
# support it, so we also try '-no-canonical-prefixes' if first option does
# not work.
opt = _add_compiler_option_if_supported(
repository_ctx,
cc,
"-fno-canonical-system-headers",
)
if len(opt) == 0:
return _add_compiler_option_if_supported(
repository_ctx,
cc,
"-no-canonical-prefixes",
)
return opt
def get_env(repository_ctx):
"""Convert the environment in a list of export if in Homebrew. Doesn't %-escape the result!
Args:
repository_ctx: The repository context.
Returns:
empty string or a list of exports in case we're running with homebrew. Don't ask me why.
"""
env = repository_ctx.os.environ
if "HOMEBREW_RUBY_PATH" in env:
return "\n".join([
"export %s='%s'" % (k, env[k].replace("'", "'\\''"))
for k in env
if k != "_" and k.find(".") == -1
])
else:
return ""
def _coverage_flags(repository_ctx, darwin):
use_llvm_cov = "1" == get_env_var(
repository_ctx,
"BAZEL_USE_LLVM_NATIVE_COVERAGE",
default = "0",
enable_warning = False,
)
if darwin or use_llvm_cov:
compile_flags = '"-fprofile-instr-generate", "-fcoverage-mapping"'
link_flags = '"-fprofile-instr-generate"'
else:
# gcc requires --coverage being passed for compilation and linking
# https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html#Instrumentation-Options
compile_flags = '"--coverage"'
link_flags = '"--coverage"'
return compile_flags, link_flags
def _find_generic(repository_ctx, name, env_name, overriden_tools, warn = False, silent = False):
"""Find a generic C++ toolchain tool. Doesn't %-escape the result."""
if name in overriden_tools:
return overriden_tools[name]
result = name
env_value = repository_ctx.os.environ.get(env_name)
env_value_with_paren = ""
if env_value != None:
env_value = env_value.strip()
if env_value:
result = env_value
env_value_with_paren = " (%s)" % env_value
if result.startswith("/"):
# Absolute path, maybe we should make this suported by our which function.
return result
result = repository_ctx.which(result)
if result == None:
msg = ("Cannot find %s or %s%s; either correct your path or set the %s" +
" environment variable") % (name, env_name, env_value_with_paren, env_name)
if warn:
if not silent:
auto_configure_warning(msg)
else:
auto_configure_fail(msg)
return result
def find_cc(repository_ctx, overriden_tools):
return _find_generic(repository_ctx, "gcc", "CC", overriden_tools)
def configure_unix_toolchain(repository_ctx, cpu_value, overriden_tools):
"""Configure C++ toolchain on Unix platforms.
Args:
repository_ctx: The repository context.
cpu_value: current cpu name.
overriden_tools: overriden tools.
"""
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:BUILD.tpl",
"@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl",
"@rules_cc//cc/private/toolchain:unix_cc_toolchain_config.bzl",
"@rules_cc//cc/private/toolchain:linux_cc_wrapper.sh.tpl",
"@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl",
])
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:unix_cc_toolchain_config.bzl"],
"cc_toolchain_config.bzl",
)
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl"],
"armeabi_cc_toolchain_config.bzl",
)
repository_ctx.file("tools/cpp/empty.cc", "int main() {}")
darwin = cpu_value == "darwin"
cc = _find_generic(repository_ctx, "gcc", "CC", overriden_tools)
overriden_tools = dict(overriden_tools)
overriden_tools["gcc"] = cc
overriden_tools["gcov"] = _find_generic(
repository_ctx,
"gcov",
"GCOV",
overriden_tools,
warn = True,
silent = True,
)
if darwin:
overriden_tools["gcc"] = "cc_wrapper.sh"
overriden_tools["ar"] = "/usr/bin/libtool"
auto_configure_warning_maybe(repository_ctx, "CC used: " + str(cc))
tool_paths = _get_tool_paths(repository_ctx, overriden_tools)
cc_toolchain_identifier = escape_string(get_env_var(
repository_ctx,
"CC_TOOLCHAIN_NAME",
"local",
False,
))
cc_wrapper_src = (
"@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl" if darwin else "@rules_cc//cc/private/toolchain:linux_cc_wrapper.sh.tpl"
)
repository_ctx.template(
"cc_wrapper.sh",
paths[cc_wrapper_src],
{
"%{cc}": escape_string(str(cc)),
"%{env}": escape_string(get_env(repository_ctx)),
},
)
cxx_opts = split_escaped(get_env_var(
repository_ctx,
"BAZEL_CXXOPTS",
"-std=c++0x",
False,
), ":")
bazel_linklibs = "-lstdc++:-lm"
bazel_linkopts = ""
link_opts = split_escaped(get_env_var(
repository_ctx,
"BAZEL_LINKOPTS",
bazel_linkopts,
False,
), ":")
link_libs = split_escaped(get_env_var(
repository_ctx,
"BAZEL_LINKLIBS",
bazel_linklibs,
False,
), ":")
gold_linker_path = _find_gold_linker_path(repository_ctx, cc)
cc_path = repository_ctx.path(cc)
if not str(cc_path).startswith(str(repository_ctx.path(".")) + "/"):
# cc is outside the repository, set -B
bin_search_flag = ["-B" + escape_string(str(cc_path.dirname))]
else:
# cc is inside the repository, don't set -B.
bin_search_flag = []
coverage_compile_flags, coverage_link_flags = _coverage_flags(repository_ctx, darwin)
builtin_include_directories = _uniq(
get_escaped_cxx_inc_directories(repository_ctx, cc, "-xc") +
get_escaped_cxx_inc_directories(repository_ctx, cc, "-xc++", cxx_opts) +
get_escaped_cxx_inc_directories(
repository_ctx,
cc,
"-xc",
_get_no_canonical_prefixes_opt(repository_ctx, cc),
) +
get_escaped_cxx_inc_directories(
repository_ctx,
cc,
"-xc++",
cxx_opts + _get_no_canonical_prefixes_opt(repository_ctx, cc),
),
)
write_builtin_include_directory_paths(repository_ctx, cc, builtin_include_directories)
repository_ctx.template(
"BUILD",
paths["@rules_cc//cc/private/toolchain:BUILD.tpl"],
{
"%{abi_libc_version}": escape_string(get_env_var(
repository_ctx,
"ABI_LIBC_VERSION",
"local",
False,
)),
"%{abi_version}": escape_string(get_env_var(
repository_ctx,
"ABI_VERSION",
"local",
False,
)),
"%{cc_compiler_deps}": get_starlark_list([":builtin_include_directory_paths"] + (
[":cc_wrapper"] if darwin else []
)),
"%{cc_toolchain_identifier}": cc_toolchain_identifier,
"%{compile_flags}": get_starlark_list(
[
# Security hardening requires optimization.
# We need to undef it as some distributions now have it enabled by default.
"-U_FORTIFY_SOURCE",
"-fstack-protector",
# All warnings are enabled. Maybe enable -Werror as well?
"-Wall",
# Enable a few more warnings that aren't part of -Wall.
] + (
_add_compiler_option_if_supported(repository_ctx, cc, "-Wthread-safety") +
_add_compiler_option_if_supported(repository_ctx, cc, "-Wself-assign")
) + (
# Disable problematic warnings.
_add_compiler_option_if_supported(repository_ctx, cc, "-Wunused-but-set-parameter") +
# has false positives
_add_compiler_option_if_supported(repository_ctx, cc, "-Wno-free-nonheap-object") +
# Enable coloring even if there's no attached terminal. Bazel removes the
# escape sequences if --nocolor is specified.
_add_compiler_option_if_supported(repository_ctx, cc, "-fcolor-diagnostics")
) + [
# Keep stack frames for debugging, even in opt mode.
"-fno-omit-frame-pointer",
],
),
"%{compiler}": escape_string(get_env_var(
repository_ctx,
"BAZEL_COMPILER",
"compiler",
False,
)),
"%{coverage_compile_flags}": coverage_compile_flags,
"%{coverage_link_flags}": coverage_link_flags,
"%{cxx_builtin_include_directories}": get_starlark_list(builtin_include_directories),
"%{cxx_flags}": get_starlark_list(cxx_opts + _escaped_cplus_include_paths(repository_ctx)),
"%{dbg_compile_flags}": get_starlark_list(["-g"]),
"%{host_system_name}": escape_string(get_env_var(
repository_ctx,
"BAZEL_HOST_SYSTEM",
"local",
False,
)),
"%{link_flags}": get_starlark_list((
["-fuse-ld=" + gold_linker_path] if gold_linker_path else []
) + _add_linker_option_if_supported(
repository_ctx,
cc,
"-Wl,-no-as-needed",
"-no-as-needed",
) + _add_linker_option_if_supported(
repository_ctx,
cc,
"-Wl,-z,relro,-z,now",
"-z",
) + (
[
"-undefined",
"dynamic_lookup",
"-headerpad_max_install_names",
] if darwin else bin_search_flag + [
# Gold linker only? Can we enable this by default?
# "-Wl,--warn-execstack",
# "-Wl,--detect-odr-violations"
] + _add_compiler_option_if_supported(
# Have gcc return the exit code from ld.
repository_ctx,
cc,
"-pass-exit-codes",
)
) + link_opts),
"%{link_libs}": get_starlark_list(link_libs),
"%{name}": cpu_value,
"%{opt_compile_flags}": get_starlark_list(
[
# No debug symbols.
# Maybe we should enable https://gcc.gnu.org/wiki/DebugFission for opt or
# even generally? However, that can't happen here, as it requires special
# handling in Bazel.
"-g0",
# Conservative choice for -O
# -O3 can increase binary size and even slow down the resulting binaries.
# Profile first and / or use FDO if you need better performance than this.
"-O2",
# Security hardening on by default.
# Conservative choice; -D_FORTIFY_SOURCE=2 may be unsafe in some cases.
"-D_FORTIFY_SOURCE=1",
# Disable assertions
"-DNDEBUG",
# Removal of unused code and data at link time (can this increase binary
# size in some cases?).
"-ffunction-sections",
"-fdata-sections",
],
),
"%{opt_link_flags}": get_starlark_list(
[] if darwin else _add_linker_option_if_supported(
repository_ctx,
cc,
"-Wl,--gc-sections",
"-gc-sections",
),
),
"%{supports_param_files}": "0" if darwin else "1",
"%{supports_start_end_lib}": "True" if gold_linker_path else "False",
"%{target_cpu}": escape_string(get_env_var(
repository_ctx,
"BAZEL_TARGET_CPU",
cpu_value,
False,
)),
"%{target_libc}": "macosx" if darwin else escape_string(get_env_var(
repository_ctx,
"BAZEL_TARGET_LIBC",
"local",
False,
)),
"%{target_system_name}": escape_string(get_env_var(
repository_ctx,
"BAZEL_TARGET_SYSTEM",
"local",
False,
)),
"%{tool_paths}": ",\n ".join(
['"%s": "%s"' % (k, v) for k, v in tool_paths.items()],
),
"%{unfiltered_compile_flags}": get_starlark_list(
_get_no_canonical_prefixes_opt(repository_ctx, cc) + [
# Make C++ compilation deterministic. Use linkstamping instead of these
# compiler symbols.
"-Wno-builtin-macro-redefined",
"-D__DATE__=\\\"redacted\\\"",
"-D__TIMESTAMP__=\\\"redacted\\\"",
"-D__TIME__=\\\"redacted\\\"",
],
),
},
)

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@ -0,0 +1,24 @@
:: Copyright 2017 The Bazel Authors. All rights reserved.
::
:: Licensed under the Apache License, Version 2.0 (the "License");
:: you may not use this file except in compliance with the License.
:: You may obtain a copy of the License at
::
:: http://www.apache.org/licenses/LICENSE-2.0
::
:: Unless required by applicable law or agreed to in writing, software
:: distributed under the License is distributed on an "AS IS" BASIS,
:: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
:: See the License for the specific language governing permissions and
:: limitations under the License.
@echo OFF
echo. 1>&2
echo The target you are compiling requires Visual C++ build tools. 1>&2
echo Bazel couldn't find a valid Visual C++ build tools installation on your machine. 1>&2
%{vc_error_message}
echo Please check your installation following https://docs.bazel.build/versions/main/windows.html#using 1>&2
echo. 1>&2
exit /b 1

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@ -0,0 +1,703 @@
# pylint: disable=g-bad-file-header
# Copyright 2016 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Configuring the C++ toolchain on Windows."""
load(
":lib_cc_configure.bzl",
"auto_configure_fail",
"auto_configure_warning",
"auto_configure_warning_maybe",
"escape_string",
"execute",
"resolve_labels",
"write_builtin_include_directory_paths",
)
def _get_path_env_var(repository_ctx, name):
"""Returns a path from an environment variable.
Removes quotes, replaces '/' with '\', and strips trailing '\'s."""
if name in repository_ctx.os.environ:
value = repository_ctx.os.environ[name]
if value[0] == "\"":
if len(value) == 1 or value[-1] != "\"":
auto_configure_fail("'%s' environment variable has no trailing quote" % name)
value = value[1:-1]
if "/" in value:
value = value.replace("/", "\\")
if value[-1] == "\\":
value = value.rstrip("\\")
return value
else:
return None
def _get_temp_env(repository_ctx):
"""Returns the value of TMP, or TEMP, or if both undefined then C:\\Windows."""
tmp = _get_path_env_var(repository_ctx, "TMP")
if not tmp:
tmp = _get_path_env_var(repository_ctx, "TEMP")
if not tmp:
tmp = "C:\\Windows\\Temp"
auto_configure_warning(
"neither 'TMP' nor 'TEMP' environment variables are set, using '%s' as default" % tmp,
)
return tmp
def _get_escaped_windows_msys_starlark_content(repository_ctx, use_mingw = False):
"""Return the content of msys cc toolchain rule."""
msys_root = ""
bazel_sh = _get_path_env_var(repository_ctx, "BAZEL_SH")
if bazel_sh:
bazel_sh = bazel_sh.replace("\\", "/").lower()
tokens = bazel_sh.rsplit("/", 1)
if tokens[0].endswith("/usr/bin"):
msys_root = tokens[0][:len(tokens[0]) - len("usr/bin")]
elif tokens[0].endswith("/bin"):
msys_root = tokens[0][:len(tokens[0]) - len("bin")]
prefix = "mingw64" if use_mingw else "usr"
tool_path_prefix = escape_string(msys_root) + prefix
tool_bin_path = tool_path_prefix + "/bin"
tool_path = {}
for tool in ["ar", "compat-ld", "cpp", "dwp", "gcc", "gcov", "ld", "nm", "objcopy", "objdump", "strip"]:
if msys_root:
tool_path[tool] = tool_bin_path + "/" + tool
else:
tool_path[tool] = "msys_gcc_installation_error.bat"
tool_paths = ",\n ".join(['"%s": "%s"' % (k, v) for k, v in tool_path.items()])
include_directories = (' "%s/",\n ' % tool_path_prefix) if msys_root else ""
return tool_paths, tool_bin_path, include_directories
def _get_system_root(repository_ctx):
"""Get System root path on Windows, default is C:\\Windows. Doesn't %-escape the result."""
systemroot = _get_path_env_var(repository_ctx, "SYSTEMROOT")
if not systemroot:
systemroot = "C:\\Windows"
auto_configure_warning_maybe(
repository_ctx,
"SYSTEMROOT is not set, using default SYSTEMROOT=C:\\Windows",
)
return escape_string(systemroot)
def _add_system_root(repository_ctx, env):
"""Running VCVARSALL.BAT and VCVARSQUERYREGISTRY.BAT need %SYSTEMROOT%\\\\system32 in PATH."""
if "PATH" not in env:
env["PATH"] = ""
env["PATH"] = env["PATH"] + ";" + _get_system_root(repository_ctx) + "\\system32"
return env
def _find_vc_path(repository_ctx):
"""Find Visual C++ build tools install path. Doesn't %-escape the result."""
# 1. Check if BAZEL_VC or BAZEL_VS is already set by user.
bazel_vc = _get_path_env_var(repository_ctx, "BAZEL_VC")
if bazel_vc:
if repository_ctx.path(bazel_vc).exists:
return bazel_vc
else:
auto_configure_warning_maybe(
repository_ctx,
"%BAZEL_VC% is set to non-existent path, ignoring.",
)
bazel_vs = _get_path_env_var(repository_ctx, "BAZEL_VS")
if bazel_vs:
if repository_ctx.path(bazel_vs).exists:
bazel_vc = bazel_vs + "\\VC"
if repository_ctx.path(bazel_vc).exists:
return bazel_vc
else:
auto_configure_warning_maybe(
repository_ctx,
"No 'VC' directory found under %BAZEL_VS%, ignoring.",
)
else:
auto_configure_warning_maybe(
repository_ctx,
"%BAZEL_VS% is set to non-existent path, ignoring.",
)
auto_configure_warning_maybe(
repository_ctx,
"Neither %BAZEL_VC% nor %BAZEL_VS% are set, start looking for the latest Visual C++" +
" installed.",
)
# 2. Check if VS%VS_VERSION%COMNTOOLS is set, if true then try to find and use
# vcvarsqueryregistry.bat / VsDevCmd.bat to detect VC++.
auto_configure_warning_maybe(repository_ctx, "Looking for VS%VERSION%COMNTOOLS environment variables, " +
"eg. VS140COMNTOOLS")
for vscommontools_env, script in [
("VS160COMNTOOLS", "VsDevCmd.bat"),
("VS150COMNTOOLS", "VsDevCmd.bat"),
("VS140COMNTOOLS", "vcvarsqueryregistry.bat"),
("VS120COMNTOOLS", "vcvarsqueryregistry.bat"),
("VS110COMNTOOLS", "vcvarsqueryregistry.bat"),
("VS100COMNTOOLS", "vcvarsqueryregistry.bat"),
("VS90COMNTOOLS", "vcvarsqueryregistry.bat"),
]:
if vscommontools_env not in repository_ctx.os.environ:
continue
script = _get_path_env_var(repository_ctx, vscommontools_env) + "\\" + script
if not repository_ctx.path(script).exists:
continue
repository_ctx.file(
"get_vc_dir.bat",
"@echo off\n" +
"call \"" + script + "\"\n" +
"echo %VCINSTALLDIR%",
True,
)
env = _add_system_root(repository_ctx, repository_ctx.os.environ)
vc_dir = execute(repository_ctx, ["./get_vc_dir.bat"], environment = env)
auto_configure_warning_maybe(repository_ctx, "Visual C++ build tools found at %s" % vc_dir)
return vc_dir
# 3. User might have purged all environment variables. If so, look for Visual C++ in registry.
# Works for Visual Studio 2017 and older. (Does not work for Visual Studio 2019 Preview.)
# TODO(laszlocsomor): check if "16.0" also has this registry key, after VS 2019 is released.
auto_configure_warning_maybe(repository_ctx, "Looking for Visual C++ through registry")
reg_binary = _get_system_root(repository_ctx) + "\\system32\\reg.exe"
vc_dir = None
for key, suffix in (("VC7", ""), ("VS7", "\\VC")):
for version in ["15.0", "14.0", "12.0", "11.0", "10.0", "9.0", "8.0"]:
if vc_dir:
break
result = repository_ctx.execute([reg_binary, "query", "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\VisualStudio\\SxS\\" + key, "/v", version])
auto_configure_warning_maybe(repository_ctx, "registry query result for VC %s:\n\nSTDOUT(start)\n%s\nSTDOUT(end)\nSTDERR(start):\n%s\nSTDERR(end)\n" %
(version, result.stdout, result.stderr))
if not result.stderr:
for line in result.stdout.split("\n"):
line = line.strip()
if line.startswith(version) and line.find("REG_SZ") != -1:
vc_dir = line[line.find("REG_SZ") + len("REG_SZ"):].strip() + suffix
if vc_dir:
auto_configure_warning_maybe(repository_ctx, "Visual C++ build tools found at %s" % vc_dir)
return vc_dir
# 4. Check default directories for VC installation
auto_configure_warning_maybe(repository_ctx, "Looking for default Visual C++ installation directory")
program_files_dir = _get_path_env_var(repository_ctx, "PROGRAMFILES(X86)")
if not program_files_dir:
program_files_dir = "C:\\Program Files (x86)"
auto_configure_warning_maybe(
repository_ctx,
"'PROGRAMFILES(X86)' environment variable is not set, using '%s' as default" % program_files_dir,
)
for path in [
"Microsoft Visual Studio\\2019\\Preview\\VC",
"Microsoft Visual Studio\\2019\\BuildTools\\VC",
"Microsoft Visual Studio\\2019\\Community\\VC",
"Microsoft Visual Studio\\2019\\Professional\\VC",
"Microsoft Visual Studio\\2019\\Enterprise\\VC",
"Microsoft Visual Studio\\2017\\BuildTools\\VC",
"Microsoft Visual Studio\\2017\\Community\\VC",
"Microsoft Visual Studio\\2017\\Professional\\VC",
"Microsoft Visual Studio\\2017\\Enterprise\\VC",
"Microsoft Visual Studio 14.0\\VC",
]:
path = program_files_dir + "\\" + path
if repository_ctx.path(path).exists:
vc_dir = path
break
if not vc_dir:
auto_configure_warning_maybe(repository_ctx, "Visual C++ build tools not found.")
return None
auto_configure_warning_maybe(repository_ctx, "Visual C++ build tools found at %s" % vc_dir)
return vc_dir
def _is_vs_2017_or_2019(vc_path):
"""Check if the installed VS version is Visual Studio 2017."""
# In VS 2017 and 2019, the location of VC is like:
# C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\
# In VS 2015 or older version, it is like:
# C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\
return vc_path.find("2017") != -1 or vc_path.find("2019") != -1
def _find_vcvars_bat_script(repository_ctx, vc_path):
"""Find batch script to set up environment variables for VC. Doesn't %-escape the result."""
if _is_vs_2017_or_2019(vc_path):
vcvars_script = vc_path + "\\Auxiliary\\Build\\VCVARSALL.BAT"
else:
vcvars_script = vc_path + "\\VCVARSALL.BAT"
if not repository_ctx.path(vcvars_script).exists:
return None
return vcvars_script
def _is_support_vcvars_ver(vc_full_version):
"""-vcvars_ver option is supported from version 14.11.25503 (VS 2017 version 15.3)."""
version = [int(i) for i in vc_full_version.split(".")]
min_version = [14, 11, 25503]
return version >= min_version
def _is_support_winsdk_selection(repository_ctx, vc_path):
"""Windows SDK selection is supported with VC 2017 / 2019 or with full VS 2015 installation."""
if _is_vs_2017_or_2019(vc_path):
return True
# By checking the source code of VCVARSALL.BAT in VC 2015, we know that
# when devenv.exe or wdexpress.exe exists, VCVARSALL.BAT supports Windows SDK selection.
vc_common_ide = repository_ctx.path(vc_path).dirname.get_child("Common7").get_child("IDE")
for tool in ["devenv.exe", "wdexpress.exe"]:
if vc_common_ide.get_child(tool).exists:
return True
return False
def setup_vc_env_vars(repository_ctx, vc_path, envvars = [], allow_empty = False, escape = True):
"""Get environment variables set by VCVARSALL.BAT script. Doesn't %-escape the result!
Args:
repository_ctx: the repository_ctx object
vc_path: Visual C++ root directory
envvars: list of envvars to retrieve; default is ["PATH", "INCLUDE", "LIB", "WINDOWSSDKDIR"]
allow_empty: allow unset envvars; if False then report errors for those
escape: if True, escape "\" as "\\" and "%" as "%%" in the envvar values
Returns:
dictionary of the envvars
"""
if not envvars:
envvars = ["PATH", "INCLUDE", "LIB", "WINDOWSSDKDIR"]
vcvars_script = _find_vcvars_bat_script(repository_ctx, vc_path)
if not vcvars_script:
auto_configure_fail("Cannot find VCVARSALL.BAT script under %s" % vc_path)
# Getting Windows SDK version set by user.
# Only supports VC 2017 & 2019 and VC 2015 with full VS installation.
winsdk_version = _get_winsdk_full_version(repository_ctx)
if winsdk_version and not _is_support_winsdk_selection(repository_ctx, vc_path):
auto_configure_warning(("BAZEL_WINSDK_FULL_VERSION=%s is ignored, " +
"because standalone Visual C++ Build Tools 2015 doesn't support specifying Windows " +
"SDK version, please install the full VS 2015 or use VC 2017/2019.") % winsdk_version)
winsdk_version = ""
# Get VC version set by user. Only supports VC 2017 & 2019.
vcvars_ver = ""
if _is_vs_2017_or_2019(vc_path):
full_version = _get_vc_full_version(repository_ctx, vc_path)
# Because VCVARSALL.BAT is from the latest VC installed, so we check if the latest
# version supports -vcvars_ver or not.
if _is_support_vcvars_ver(_get_latest_subversion(repository_ctx, vc_path)):
vcvars_ver = "-vcvars_ver=" + full_version
cmd = "\"%s\" amd64 %s %s" % (vcvars_script, winsdk_version, vcvars_ver)
print_envvars = ",".join(["{k}=%{k}%".format(k = k) for k in envvars])
repository_ctx.file(
"get_env.bat",
"@echo off\n" +
("call %s > NUL \n" % cmd) + ("echo %s \n" % print_envvars),
True,
)
env = _add_system_root(repository_ctx, {k: "" for k in envvars})
envs = execute(repository_ctx, ["./get_env.bat"], environment = env).split(",")
env_map = {}
for env in envs:
key, value = env.split("=", 1)
env_map[key] = escape_string(value.replace("\\", "\\\\")) if escape else value
if not allow_empty:
_check_env_vars(env_map, cmd, expected = envvars)
return env_map
def _check_env_vars(env_map, cmd, expected):
for env in expected:
if not env_map.get(env):
auto_configure_fail(
"Setting up VC environment variables failed, %s is not set by the following command:\n %s" % (env, cmd),
)
def _get_latest_subversion(repository_ctx, vc_path):
"""Get the latest subversion of a VS 2017/2019 installation.
For VS 2017 & 2019, there could be multiple versions of VC build tools.
The directories are like:
<vc_path>\\Tools\\MSVC\\14.10.24930\\bin\\HostX64\\x64
<vc_path>\\Tools\\MSVC\\14.16.27023\\bin\\HostX64\\x64
This function should return 14.16.27023 in this case."""
versions = [path.basename for path in repository_ctx.path(vc_path + "\\Tools\\MSVC").readdir()]
if len(versions) < 1:
auto_configure_warning_maybe(repository_ctx, "Cannot find any VC installation under BAZEL_VC(%s)" % vc_path)
return None
# Parse the version string into integers, then sort the integers to prevent textual sorting.
version_list = []
for version in versions:
parts = [int(i) for i in version.split(".")]
version_list.append((parts, version))
version_list = sorted(version_list)
latest_version = version_list[-1][1]
auto_configure_warning_maybe(repository_ctx, "Found the following VC verisons:\n%s\n\nChoosing the latest version = %s" % ("\n".join(versions), latest_version))
return latest_version
def _get_vc_full_version(repository_ctx, vc_path):
"""Return the value of BAZEL_VC_FULL_VERSION if defined, otherwise the latest version."""
if "BAZEL_VC_FULL_VERSION" in repository_ctx.os.environ:
return repository_ctx.os.environ["BAZEL_VC_FULL_VERSION"]
return _get_latest_subversion(repository_ctx, vc_path)
def _get_winsdk_full_version(repository_ctx):
"""Return the value of BAZEL_WINSDK_FULL_VERSION if defined, otherwise an empty string."""
return repository_ctx.os.environ.get("BAZEL_WINSDK_FULL_VERSION", default = "")
def _find_msvc_tool(repository_ctx, vc_path, tool):
"""Find the exact path of a specific build tool in MSVC. Doesn't %-escape the result."""
tool_path = None
if _is_vs_2017_or_2019(vc_path):
full_version = _get_vc_full_version(repository_ctx, vc_path)
if full_version:
tool_path = "%s\\Tools\\MSVC\\%s\\bin\\HostX64\\x64\\%s" % (vc_path, full_version, tool)
else:
# For VS 2015 and older version, the tools are under:
# C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64
tool_path = vc_path + "\\bin\\amd64\\" + tool
if not tool_path or not repository_ctx.path(tool_path).exists:
return None
return tool_path.replace("\\", "/")
def _find_missing_vc_tools(repository_ctx, vc_path):
"""Check if any required tool is missing under given VC path."""
missing_tools = []
if not _find_vcvars_bat_script(repository_ctx, vc_path):
missing_tools.append("VCVARSALL.BAT")
for tool in ["cl.exe", "link.exe", "lib.exe", "ml64.exe"]:
if not _find_msvc_tool(repository_ctx, vc_path, tool):
missing_tools.append(tool)
return missing_tools
def _is_support_debug_fastlink(repository_ctx, linker):
"""Run linker alone to see if it supports /DEBUG:FASTLINK."""
if _use_clang_cl(repository_ctx):
# LLVM's lld-link.exe doesn't support /DEBUG:FASTLINK.
return False
result = execute(repository_ctx, [linker], expect_failure = True)
return result.find("/DEBUG[:{FASTLINK|FULL|NONE}]") != -1
def _find_llvm_path(repository_ctx):
"""Find LLVM install path."""
# 1. Check if BAZEL_LLVM is already set by user.
bazel_llvm = _get_path_env_var(repository_ctx, "BAZEL_LLVM")
if bazel_llvm:
return bazel_llvm
auto_configure_warning_maybe(repository_ctx, "'BAZEL_LLVM' is not set, " +
"start looking for LLVM installation on machine.")
# 2. Look for LLVM installation through registry.
auto_configure_warning_maybe(repository_ctx, "Looking for LLVM installation through registry")
reg_binary = _get_system_root(repository_ctx) + "\\system32\\reg.exe"
llvm_dir = None
result = repository_ctx.execute([reg_binary, "query", "HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\LLVM\\LLVM"])
auto_configure_warning_maybe(repository_ctx, "registry query result for LLVM:\n\nSTDOUT(start)\n%s\nSTDOUT(end)\nSTDERR(start):\n%s\nSTDERR(end)\n" %
(result.stdout, result.stderr))
if not result.stderr:
for line in result.stdout.split("\n"):
line = line.strip()
if line.startswith("(Default)") and line.find("REG_SZ") != -1:
llvm_dir = line[line.find("REG_SZ") + len("REG_SZ"):].strip()
if llvm_dir:
auto_configure_warning_maybe(repository_ctx, "LLVM installation found at %s" % llvm_dir)
return llvm_dir
# 3. Check default directories for LLVM installation
auto_configure_warning_maybe(repository_ctx, "Looking for default LLVM installation directory")
program_files_dir = _get_path_env_var(repository_ctx, "PROGRAMFILES")
if not program_files_dir:
program_files_dir = "C:\\Program Files"
auto_configure_warning_maybe(
repository_ctx,
"'PROGRAMFILES' environment variable is not set, using '%s' as default" % program_files_dir,
)
path = program_files_dir + "\\LLVM"
if repository_ctx.path(path).exists:
llvm_dir = path
if not llvm_dir:
auto_configure_warning_maybe(repository_ctx, "LLVM installation not found.")
return None
auto_configure_warning_maybe(repository_ctx, "LLVM installation found at %s" % llvm_dir)
return llvm_dir
def _find_llvm_tool(repository_ctx, llvm_path, tool):
"""Find the exact path of a specific build tool in LLVM. Doesn't %-escape the result."""
tool_path = llvm_path + "\\bin\\" + tool
if not repository_ctx.path(tool_path).exists:
return None
return tool_path.replace("\\", "/")
def _use_clang_cl(repository_ctx):
"""Returns True if USE_CLANG_CL is set to 1."""
return repository_ctx.os.environ.get("USE_CLANG_CL", default = "0") == "1"
def _find_missing_llvm_tools(repository_ctx, llvm_path):
"""Check if any required tool is missing under given LLVM path."""
missing_tools = []
for tool in ["clang-cl.exe", "lld-link.exe", "llvm-lib.exe"]:
if not _find_llvm_tool(repository_ctx, llvm_path, tool):
missing_tools.append(tool)
return missing_tools
def _get_clang_version(repository_ctx, clang_cl):
result = repository_ctx.execute([clang_cl, "-v"])
if result.return_code != 0:
auto_configure_fail("Failed to get clang version by running \"%s -v\"" % clang_cl)
# Stderr should look like "clang version X.X.X ..."
return result.stderr.splitlines()[0].split(" ")[2]
def _get_msys_mingw_vars(repository_ctx):
"""Get the variables we need to populate the msys/mingw toolchains."""
tool_paths, tool_bin_path, inc_dir_msys = _get_escaped_windows_msys_starlark_content(repository_ctx)
tool_paths_mingw, tool_bin_path_mingw, inc_dir_mingw = _get_escaped_windows_msys_starlark_content(repository_ctx, use_mingw = True)
write_builtin_include_directory_paths(repository_ctx, "mingw", [inc_dir_mingw], file_suffix = "_mingw")
msys_mingw_vars = {
"%{cxx_builtin_include_directories}": inc_dir_msys,
"%{mingw_cxx_builtin_include_directories}": inc_dir_mingw,
"%{mingw_tool_bin_path}": tool_bin_path_mingw,
"%{mingw_tool_paths}": tool_paths_mingw,
"%{tool_bin_path}": tool_bin_path,
"%{tool_paths}": tool_paths,
}
return msys_mingw_vars
def _get_msvc_vars(repository_ctx, paths):
"""Get the variables we need to populate the MSVC toolchains."""
msvc_vars = dict()
vc_path = _find_vc_path(repository_ctx)
missing_tools = None
if not vc_path:
repository_ctx.template(
"vc_installation_error.bat",
paths["@rules_cc//cc/private/toolchain:vc_installation_error.bat.tpl"],
{"%{vc_error_message}": ""},
)
else:
missing_tools = _find_missing_vc_tools(repository_ctx, vc_path)
if missing_tools:
message = "\r\n".join([
"echo. 1>&2",
"echo Visual C++ build tools seems to be installed at %s 1>&2" % vc_path,
"echo But Bazel can't find the following tools: 1>&2",
"echo %s 1>&2" % ", ".join(missing_tools),
"echo. 1>&2",
])
repository_ctx.template(
"vc_installation_error.bat",
paths["@rules_cc//cc/private/toolchain:vc_installation_error.bat.tpl"],
{"%{vc_error_message}": message},
)
if not vc_path or missing_tools:
write_builtin_include_directory_paths(repository_ctx, "msvc", [], file_suffix = "_msvc")
msvc_vars = {
"%{dbg_mode_debug_flag}": "/DEBUG",
"%{fastbuild_mode_debug_flag}": "/DEBUG",
"%{msvc_cl_path}": "vc_installation_error.bat",
"%{msvc_cxx_builtin_include_directories}": "",
"%{msvc_env_include}": "msvc_not_found",
"%{msvc_env_lib}": "msvc_not_found",
"%{msvc_env_path}": "msvc_not_found",
"%{msvc_env_tmp}": "msvc_not_found",
"%{msvc_lib_path}": "vc_installation_error.bat",
"%{msvc_link_path}": "vc_installation_error.bat",
"%{msvc_ml_path}": "vc_installation_error.bat",
}
return msvc_vars
env = setup_vc_env_vars(repository_ctx, vc_path)
escaped_paths = escape_string(env["PATH"])
escaped_include_paths = escape_string(env["INCLUDE"])
escaped_lib_paths = escape_string(env["LIB"])
escaped_tmp_dir = escape_string(_get_temp_env(repository_ctx).replace("\\", "\\\\"))
llvm_path = ""
if _use_clang_cl(repository_ctx):
llvm_path = _find_llvm_path(repository_ctx)
if not llvm_path:
auto_configure_fail("\nUSE_CLANG_CL is set to 1, but Bazel cannot find Clang installation on your system.\n" +
"Please install Clang via http://releases.llvm.org/download.html\n")
cl_path = _find_llvm_tool(repository_ctx, llvm_path, "clang-cl.exe")
link_path = _find_llvm_tool(repository_ctx, llvm_path, "lld-link.exe")
if not link_path:
link_path = _find_msvc_tool(repository_ctx, vc_path, "link.exe")
lib_path = _find_llvm_tool(repository_ctx, llvm_path, "llvm-lib.exe")
if not lib_path:
lib_path = _find_msvc_tool(repository_ctx, vc_path, "lib.exe")
else:
cl_path = _find_msvc_tool(repository_ctx, vc_path, "cl.exe")
link_path = _find_msvc_tool(repository_ctx, vc_path, "link.exe")
lib_path = _find_msvc_tool(repository_ctx, vc_path, "lib.exe")
msvc_ml_path = _find_msvc_tool(repository_ctx, vc_path, "ml64.exe")
escaped_cxx_include_directories = []
for path in escaped_include_paths.split(";"):
if path:
escaped_cxx_include_directories.append("\"%s\"" % path)
if llvm_path:
clang_version = _get_clang_version(repository_ctx, cl_path)
clang_dir = llvm_path + "\\lib\\clang\\" + clang_version
clang_include_path = (clang_dir + "\\include").replace("\\", "\\\\")
escaped_cxx_include_directories.append("\"%s\"" % clang_include_path)
clang_lib_path = (clang_dir + "\\lib\\windows").replace("\\", "\\\\")
escaped_lib_paths = escaped_lib_paths + ";" + clang_lib_path
support_debug_fastlink = _is_support_debug_fastlink(repository_ctx, link_path)
write_builtin_include_directory_paths(repository_ctx, "msvc", escaped_cxx_include_directories, file_suffix = "_msvc")
msvc_vars = {
"%{dbg_mode_debug_flag}": "/DEBUG:FULL" if support_debug_fastlink else "/DEBUG",
"%{fastbuild_mode_debug_flag}": "/DEBUG:FASTLINK" if support_debug_fastlink else "/DEBUG",
"%{msvc_cl_path}": cl_path,
"%{msvc_cxx_builtin_include_directories}": " " + ",\n ".join(escaped_cxx_include_directories),
"%{msvc_env_include}": escaped_include_paths,
"%{msvc_env_lib}": escaped_lib_paths,
"%{msvc_env_path}": escaped_paths,
"%{msvc_env_tmp}": escaped_tmp_dir,
"%{msvc_lib_path}": lib_path,
"%{msvc_link_path}": link_path,
"%{msvc_ml_path}": msvc_ml_path,
}
return msvc_vars
def _get_clang_cl_vars(repository_ctx, paths, msvc_vars):
"""Get the variables we need to populate the clang-cl toolchains."""
llvm_path = _find_llvm_path(repository_ctx)
error_script = None
if msvc_vars["%{msvc_cl_path}"] == "vc_installation_error.bat":
error_script = "vc_installation_error.bat"
elif not llvm_path:
repository_ctx.template(
"clang_installation_error.bat",
paths["@rules_cc//cc/private/toolchain:clang_installation_error.bat.tpl"],
{"%{clang_error_message}": ""},
)
error_script = "clang_installation_error.bat"
else:
missing_tools = _find_missing_llvm_tools(repository_ctx, llvm_path)
if missing_tools:
message = "\r\n".join([
"echo. 1>&2",
"echo LLVM/Clang seems to be installed at %s 1>&2" % llvm_path,
"echo But Bazel can't find the following tools: 1>&2",
"echo %s 1>&2" % ", ".join(missing_tools),
"echo. 1>&2",
])
repository_ctx.template(
"clang_installation_error.bat",
paths["@rules_cc//cc/private/toolchain:clang_installation_error.bat.tpl"],
{"%{clang_error_message}": message},
)
error_script = "clang_installation_error.bat"
if error_script:
write_builtin_include_directory_paths(repository_ctx, "clang-cl", [], file_suffix = "_clangcl")
clang_cl_vars = {
"%{clang_cl_cl_path}": error_script,
"%{clang_cl_cxx_builtin_include_directories}": "",
"%{clang_cl_dbg_mode_debug_flag}": "/DEBUG",
"%{clang_cl_env_include}": "clang_cl_not_found",
"%{clang_cl_env_lib}": "clang_cl_not_found",
"%{clang_cl_env_path}": "clang_cl_not_found",
"%{clang_cl_env_tmp}": "clang_cl_not_found",
"%{clang_cl_fastbuild_mode_debug_flag}": "/DEBUG",
"%{clang_cl_lib_path}": error_script,
"%{clang_cl_link_path}": error_script,
"%{clang_cl_ml_path}": error_script,
}
return clang_cl_vars
clang_cl_path = _find_llvm_tool(repository_ctx, llvm_path, "clang-cl.exe")
lld_link_path = _find_llvm_tool(repository_ctx, llvm_path, "lld-link.exe")
llvm_lib_path = _find_llvm_tool(repository_ctx, llvm_path, "llvm-lib.exe")
clang_version = _get_clang_version(repository_ctx, clang_cl_path)
clang_dir = llvm_path + "\\lib\\clang\\" + clang_version
clang_include_path = (clang_dir + "\\include").replace("\\", "\\\\")
clang_lib_path = (clang_dir + "\\lib\\windows").replace("\\", "\\\\")
clang_cl_include_directories = msvc_vars["%{msvc_cxx_builtin_include_directories}"] + (",\n \"%s\"" % clang_include_path)
write_builtin_include_directory_paths(repository_ctx, "clang-cl", [clang_cl_include_directories], file_suffix = "_clangcl")
clang_cl_vars = {
"%{clang_cl_cl_path}": clang_cl_path,
"%{clang_cl_cxx_builtin_include_directories}": clang_cl_include_directories,
# LLVM's lld-link.exe doesn't support /DEBUG:FASTLINK.
"%{clang_cl_dbg_mode_debug_flag}": "/DEBUG",
"%{clang_cl_env_include}": msvc_vars["%{msvc_env_include}"] + ";" + clang_include_path,
"%{clang_cl_env_lib}": msvc_vars["%{msvc_env_lib}"] + ";" + clang_lib_path,
"%{clang_cl_env_path}": msvc_vars["%{msvc_env_path}"],
"%{clang_cl_env_tmp}": msvc_vars["%{msvc_env_tmp}"],
"%{clang_cl_fastbuild_mode_debug_flag}": "/DEBUG",
"%{clang_cl_lib_path}": llvm_lib_path,
"%{clang_cl_link_path}": lld_link_path,
"%{clang_cl_ml_path}": msvc_vars["%{msvc_ml_path}"],
}
return clang_cl_vars
def configure_windows_toolchain(repository_ctx):
"""Configure C++ toolchain on Windows.
Args:
repository_ctx: The repository context.
"""
paths = resolve_labels(repository_ctx, [
"@rules_cc//cc/private/toolchain:BUILD.windows.tpl",
"@rules_cc//cc/private/toolchain:windows_cc_toolchain_config.bzl",
"@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl",
"@rules_cc//cc/private/toolchain:vc_installation_error.bat.tpl",
"@rules_cc//cc/private/toolchain:msys_gcc_installation_error.bat",
"@rules_cc//cc/private/toolchain:clang_installation_error.bat.tpl",
])
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:windows_cc_toolchain_config.bzl"],
"windows_cc_toolchain_config.bzl",
)
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl"],
"armeabi_cc_toolchain_config.bzl",
)
repository_ctx.symlink(
paths["@rules_cc//cc/private/toolchain:msys_gcc_installation_error.bat"],
"msys_gcc_installation_error.bat",
)
template_vars = dict()
msvc_vars = _get_msvc_vars(repository_ctx, paths)
template_vars.update(msvc_vars)
template_vars.update(_get_clang_cl_vars(repository_ctx, paths, msvc_vars))
template_vars.update(_get_msys_mingw_vars(repository_ctx))
repository_ctx.template(
"BUILD",
paths["@rules_cc//cc/private/toolchain:BUILD.windows.tpl"],
template_vars,
)

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cc/private/toolchain/windows_cc_toolchain_config.bzl Normal file
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22
cc/repositories.bzl
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@ -1,10 +1,18 @@
"""Repository rules entry point module for rules_cc."""
# WARNING: This file only exists for backwards-compatibility.
# rules_cc uses the Bazel federation, so please add any new dependencies to
# rules_cc_deps() in
# https://github.com/bazelbuild/bazel-federation/blob/master/repositories.bzl
# Third party dependencies can be added to
# https://github.com/bazelbuild/bazel-federation/blob/master/third_party_repositories.bzl
# Ideally we'd delete this entire file.
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
load("//cc/private/toolchain:cc_configure.bzl", "cc_configure")
def rules_cc_dependencies():
maybe(
_maybe(
http_archive,
name = "bazel_skylib",
sha256 = "2ea8a5ed2b448baf4a6855d3ce049c4c452a6470b1efd1504fdb7c1c134d220a",
@ -16,7 +24,9 @@ def rules_cc_dependencies():
)
# buildifier: disable=unnamed-macro
def rules_cc_toolchains(*_args):
# Use the auto-configured toolchains defined in @bazel_tools//tools/cpp until they have been
# fully migrated to rules_cc.
pass
def rules_cc_toolchains(*args):
cc_configure(*args)
def _maybe(repo_rule, name, **kwargs):
if not native.existing_rule(name):
repo_rule(name = name, **kwargs)